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(newest | oldest) View (newer 250 | older 250) (20 | 50 | 100 | 250 | 500)- 05:17, 10 April 2024 Saurabh talk contribs created page Rocky 9.x Ventoy (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > File system management > Rocky 9.x Ventoy It is better to use Ventoy to have multiple OS installers on a single USB in comparison to dd approach or Rufus or some live USB creator. For creating bootable USB via Ventoy use: # Go to https://www.ventoy.net/en/download.html and download Linux .tar.gz file...")
- 05:06, 10 April 2024 Saurabh talk contribs created page Rocky 9.x loginctl (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x systemd or systemctl > Rocky 9.x loginctl It is possible for user session to end abruptly and hence not visible in output of: <pre> w </pre> In such cases if they have existing loginctl / systemd session we can see such sessions via: <pre> loginctl list-sessions </pre> We can grep units related to listed session ID via: <...")
- 05:02, 10 April 2024 Saurabh talk contribs created page Rocky 9.x Debugging systemd issues (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x systemd or systemctl > Rocky 9.x Debugging systemd issues At times we may need to debug systemd if we dont know what is going on or especially if some command is running via systemd but we dont know which unit/service is responsible for running this command. In such cases enable debug option in systemd using: # Edit '<tt>/...")
- 04:55, 10 April 2024 Saurabh talk contribs created page Rocky 9.x journalctl options (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x systemd or systemctl > Rocky 9.x journalctl options =Logs after current boot (-b)= We can use below to see logs post current boot: <pre> journalctl -b </pre> This can be useful if we want to debug some service which is not running eg mariadb / sshd etc. and we have tried to start it manually after current boot perhaps after...")
- 04:43, 10 April 2024 Saurabh talk contribs created page Rocky 9.x systemd or systemctl (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x systemd or systemctl *Rocky 9.x systemd service file configuration options '''There are older articles on this at:''' *CentOS 8.x systemd or systemctl *Systemd Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x systemd or...")
- 04:43, 10 April 2024 Saurabh talk contribs created page Rocky 9.x systemd service file configuration options (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x systemd or systemctl > Rocky 9.x systemd service file configuration options =OnBootSec= The OnBootSec option in systemd services is used to define a timer relative to the boot time of the system. This timer is triggered when the system has finished booting up and is expressed in seconds. It is primarily useful when configur...")
- 04:32, 10 April 2024 Saurabh talk contribs created page Sonicwall firewall Configure remote user access SSL VPN (Created page with "Home > Enterprise security devices or applications > Sonicwall firewall > Sonicwall firewall Configure remote user access SSL VPN To configure remote access SSL VPN with Sonicwall firewall use: # Identify a public WAN interface with static IP for configuring remote access VPN. Note the interface name and public IP. # Go to Manage -> Connecitivity -> VPN -> Base settings # Click on Add to create a new VPN settings for selected ISP public IP # I...")
- 04:22, 10 April 2024 Saurabh talk contribs created page Rocky 9.x Backup Tools (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Backup Tools *Rocky 9.x rsync '''Older notes on rsync are available at:''' *CentOS 8.x rsync *Rsync Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Backup Tools")
- 04:22, 10 April 2024 Saurabh talk contribs created page Rocky 9.x rsync (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Backup Tools > Rocky 9.x rsync *Rocky 9.x rsync copy files with paths mentioned in a text file Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Backup Tools > Rocky 9.x rsync")
- 04:22, 10 April 2024 Saurabh talk contribs created page Rocky 9.x rsync copy files with paths mentioned in a text file (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Backup Tools > Rocky 9.x rsync > Rocky 9.x rsync copy files with paths mentioned in a text file If we need to rsync only specific files and not all sub-folders and files and the path of files to be synced in captured in a text file then we can use following rsync syntax: <pre> rsync -av --files-from=yourfilelist.txt /sourcedirectory/ /destination/ </pre> Here, because of use of...")
- 04:16, 10 April 2024 Saurabh talk contribs created page Rocky 9.x Owncloud client via AppImage (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > File Sharing > Owncloud > Rocky 9.x Owncloud client via AppImage Latest owncloud client are packaged as AppImage. They can be installed using: # (Optionally) Changed the gnome desktop display to "Standard (X11 Display manager)" from "Standard (Wayland)". This is not mandatory for owncloud to work on Rocky 9.2 onwards. # Check for latest release...")
- 04:10, 10 April 2024 Saurabh talk contribs created page Stacking netgear switches (Created page with "Home > Switch configuration notes > Stacking netgear switches To stack two Netgear M4300-24X switches using cli use below steps: # Identify the ports to be used for stacking. These could be either 1 or 2 stack ports, depending upon need and availability. Ensure we have appropriate cables to connect these ports (DAC, copper, LC-LC, etc.). '''Dont connect these cables yet. We will connect during reboot in future steps'''. # Ideally stack switches...")
- 04:02, 10 April 2024 Saurabh talk contribs created page Doing XFS repair for LVM volumes that are auto mounted by cluster configuration (Created page with "Home > Suse > SAP setup and maintenance > Doing XFS repair for LVM volumes that are auto mounted by cluster configuration If there is issue with xfs filesystem due to which it is not getting mounted then crm status may show errors such as: <pre> xml <rsc_order idFailed Resource Actions: * rsc_fs_ASCS02_sapEXAas_start_0 on exaprdapp01 'unknown error' (1): call=105, status=complete, exitreason='Couldn't mount device [/dev/usrsapEXAASCS02VG/usrsap...")
- 03:39, 10 April 2024 Saurabh talk contribs created page Rocky 9.x Rate limiting connections to apache (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Web Servers > Apache '''This has not been tested practically. There could be mistakes / errors in below steps'''. =Rate limit incoming connections using iptables recent module= We can achieve rate limiting using `firewalld`, which interfaces with `iptables` in the backend. The process involves creating direct `firewalld` rules...")
- 09:40, 9 April 2024 Saurabh talk contribs created page Rocky 9.x Ansible installation (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Package management > Rocky 9.x Ansible installation To install ansible on Rocky 9.x use: <pre> dnf -y install ansible-core </pre> Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x Package management|Package mana...")
- 09:38, 9 April 2024 Saurabh talk contribs created page Rocky 9.x Podman (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x virtualization > Rocky 9.x Podman *Rocky 9.x podman basics '''There are older articles on podman at CentOS 8.x podman''' Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x virtualization > Rocky 9.x Podman")
- 09:38, 9 April 2024 Saurabh talk contribs created page Rocky 9.x podman basics (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x virtualization > Rocky 9.x Podman > Rocky 9.x podman basics =Installation= For installation use: <pre> dnf -y install podman podman version podman info </pre> =Download rockylinux9 image= For rocky9 podman images use: <pre> podman image search rocky podman pull docker.io/library/rockylinux:9.0 podman image list -a #Or simply "podman images" </pre> =Move podman containe...")
- 09:35, 9 April 2024 Saurabh talk contribs created page Rocky 9.x virtualization (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x virtualization *Rocky 9.x Podman Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x virtualization")
- 03:41, 4 April 2024 Saurabh talk contribs created page End point security (Created page with "Home > Security tips > End point security *SentinelOne Home > Security tips > End point security")
- 03:41, 4 April 2024 Saurabh talk contribs created page SentinelOne (Created page with "Home > Security tips > End point security > SentinelOne *Create path exclusion in SentinelOne Home > Security tips > End point security > SentinelOne")
- 03:41, 4 April 2024 Saurabh talk contribs created page Create path exclusion in SentinelOne (Created page with "Home > Security tips > End point security > SentinelOne > Create path exclusion in SentinelOne Sometimes application such as end-point backup may not work properly if we have SentinelOne based End-point protection as backup tools will try to work with Volume Shadow Copy (VSS) and other OS files. In that case we may have to create interoperability exclusion for the backup tool for it to work properly. To create a path exclusion in Sentinel...")
- 03:17, 4 April 2024 Saurabh talk contribs created page Useful Windows cmd options (Created page with "Home > Windows > Windows Desktop Tools or Utilities > Useful Windows cmd options =Calculate hash such as md5 or sha1 for a file in Windows= To calculate hash of a file in Windows use: <pre> certutil -hashfile <path\filename.ext> <hash-algorithm> </pre> Where <hash-algorithm> can be MD5, SHA1, SHA256 or SHA512. Home > Windows > Windows Desktop Tools or Utilities > Useful Windows cmd options")
- 09:03, 28 March 2024 Saurabh talk contribs created page Zentyal unable to ping gateway from zentyal server (Created page with " Home > Zentyal > Zentyal unable to ping gateway from zentyal server After deploying Zentyal as internal server with just one interface (no proxy / Gateway feature), from SSH prompt we are unable to ping the gateway IP from the Zentyal server. This is after adding ICMP allowed in all four types of packet filter. Note that from other machines we are able to ping Zentyal (Incoming). Only outgoing ping to gateway from Zentyal was found not to be w...")
- 09:01, 28 March 2024 Saurabh talk contribs created page Zentyal (Created page with " Home > Zentyal *Zentyal Configure local recursive DNS for LAN systems Home > Zentyal")
- 09:01, 28 March 2024 Saurabh talk contribs created page Zentyal Configure local recursive DNS for LAN systems (Created page with " Home > Zentyal > Zentyal Configure local recursive DNS for LAN systems To configure Zentyal DNS service as local recursive DNS for LAN systems use: # ssh to zentyal as normal user and use "sudo su -" to get root access # Edit file '<tt>/etc/zentyal/dns.conf</tt>' (Path for this in below reference link is wrong) with #:<pre> #:: intnets = 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16 #:</pre> # I could not find option to restart DNS service so I chos...")
- 08:16, 28 March 2024 Saurabh talk contribs created page Paloalto firewall clear application usage data (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto troubleshooting options > Paloalto firewall clear application usage data On the Policy -> security page we can see some values related to each rule such as: * When was the rule created * When was it last modified * No. of hits etc. Along with this we also see a link showing count / types of application identified/allowed based on that rule. In most organizati...")
- 08:08, 28 March 2024 Saurabh talk contribs created page Solve 2x2 Rubik's cube (Created page with " Home > Hardware > Solve 2x2 Rubik's cube =Notation= There are six notations for: ; L : Left ; R : Right ; U : Up ; D : Down ; F : Front ; B : Back In these if the notations are same as above then we need to rotate clock-wise. Assume clock to be present on the floor, on the wall on the left and on the wall on the front. Accordingly calculate clockwise for both U/D (Clock on floor), L/R (Clock on left wall) and F/B (Call on wall in front of you)...")
- 04:53, 26 February 2024 Saurabh talk contribs created page Malware download links (Created page with "Home > Security tips > Malware download links During a recent testing of XDR needed a few malware to see if XDR can even detect these based on AI / heuristics without depending too much on hashes. For that downloaded required malware from: * https://www.ikarussecurity.com/en/private-customers/download-test-viruses/ * https://www.spyshelter.com/security-test-tool/ * https://www.wicar.org/test-malware.html * http://www.tekdefense.com/downloads/malw...")
- 04:30, 26 February 2024 Saurabh talk contribs created page AI tools (Created page with "Home > Online tools and utilities > AI tools By using Very large language models we see emergent behavior and capabilities that we do not see in other smaller models. With the rise of LLMs we have a large no. of AI tools at disposal. Some of them are described below. =Used tools= ; https://www.perplexity.ai/ : This allows asking very specific queries and getting a precise answer. The best part of this tool is precision and also references based...")
- 03:58, 26 February 2024 Saurabh talk contribs created page Suse working with SMT server (Created page with "Home > Suse > Suse working with SMT server =About SMT= To help with product updates and registrations centrally via a local server without requiring each server to have outgoing connectivity directly to Suse Customer Center (SCC) or Internet. This also helps in avoiding repeat download of OS update packages for each server over WAN link. =Error while registering an internal machine with local SMT= We might see error such as below while using lo...")
- 03:30, 26 February 2024 Saurabh talk contribs created page Reset ESXi root password (Created page with "Home > VMWare platform > VMWare vSphere or ESXi > Reset ESXi root password Official KB at https://kb.vmware.com/s/article/1317898 suggests only option to reset password in ESXi 3.5 and above is by reinstalling. However as per referece link we have a few other options such as: '''Note that the below options are not validated in production yet''' ; Host profiles : Via vCenter extract existing host's host-profile. Then edit the host profile an...")
- 10:04, 25 February 2024 Saurabh talk contribs created page Useful Windows powershell options (Created page with "Home > Windows > Windows Desktop Tools or Utilities > Useful Windows powershell options =Test-NetConnection= We can test network connectivity to a remote computer / port via: <pre> Test-NetConnection [[-ComputerName] <String>] -Port <Int32> [-InformationLevel <String>] [<CommonParameters>] </pre> For exmaple: <pre> Test-NetConnection -ComputerName 10.1.1.1 -Port 443 -InformationLevel "Detailed" </pre> This can be a useful alternative to Linux...")
- 09:30, 25 February 2024 Saurabh talk contribs created page Rocky 9.x Issues while connecting to some wireless networks using Broadcom wireless (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Network Configuration > Rocky 9.x Issues while connecting to some wireless networks using Broadcom wireless For messages such as below repeated multiple times in '<tt>/var/log/messages</tt>': <pre> Feb 25 13:45:28 barjatiyarklp wpa_supplicant[1660]: wlp3s0: CTRL-EVENT-SCAN-FAILED ret=-22 retry=1 </...")
- 04:13, 20 February 2024 Saurabh talk contribs created page Live Optics (Created page with "Home > VMWare platform > VMWare Platform Miscellaneous > Live Optics =Getting current resource utilization= We can use liveoptics for getting current resource utilization such as: * 95% IOPS * Peak and 95% CPU usage * Peak and 95% memory usage * Overall storage usage etc. for a physical host, hypervisor such as Hyper-V or ESXi, etc. This information is critical if we are trying to size a new environment during migration - P2V or V2V or hard...")
- 04:07, 20 February 2024 Saurabh talk contribs created page RVTools (Created page with "Home > VMWare platform > VMWare Platform Miscellaneous > RVTools =Getting information about ESXi or vCenter environment= We can get detailed information about ESXi or vCenter environment including information on health issues such as: * Connected CD/DVD drive * CPU/Memory configuration issues * Zombie disks by using RV tools. We only need to give ESXi host / vCenter information (IP, Username, Password) and then within a minute we can see all t...")
- 12:39, 4 December 2023 Saurabh talk contribs created page Securing organizations IT infrastructure from modern threats (Created page with "Home > Security tips > Securing organizations IT infrastructure from modern threats To secure an organization against modern threats consider following: ; User VLANs gateway at firewall : All VLANs should be only L2 at core / distribution / access level. Gateway for all users should be at perimeter firewall. All traffic between two user VLANs should go via firewall. : In this case have separate VLANs for printers, Biometric devices, CCTV, etc....")
- 05:47, 12 November 2023 Saurabh talk contribs created page Rocky 9.x Network Configuration (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Network Configuration *Rocky 9.x Look at network interface statistics Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Network Configuration")
- 05:47, 12 November 2023 Saurabh talk contribs created page Rocky 9.x Look at network interface statistics (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Network Configuration > Look at network interface statistics =Look at per interface statistics= Per-interface statistics can be seen at: <pre> /sys/class/net/<interface-name>/statistics </pre> Refer: * https://stackoverflow.com/questions/349576/linux-re...")
- 05:17, 12 November 2023 Saurabh talk contribs created page Unable to login into ESXi host web UI or SSH (Created page with "Home > VMWare platform > VMWare vSphere or ESXi > Unable to login into ESXi host web UI or SSH If you are unable to login to ESXi Web UI and even SSH while the same password is working on ESXi DCUI console ( https://kb.vmware.com/s/article/2148363 ) then it is possible that ESXi is locked. Through DCUI console disable ESXi lockdown mode and after that the Web UI and SSH login should work. Refer: * https://communities.vmware.com/t5/ESXi-Discus...")
- 05:13, 12 November 2023 Saurabh talk contribs created page Convert image to base64 (Created page with "Home > Online tools and utilities > Convert image to base64 While writing HTML code, it is possible to embed image directly in the HTML page instead of referring it from some other location as explained at https://www.w3docs.com/snippets/html/how-to-display-base64-images-in-html.html For this to convert image to base64 we can use online tool at: * https://www.base64encoder.io/image-to-base64-converter/ Home > Online tools and...")
- 05:04, 12 November 2023 Saurabh talk contribs created page Rocky 9.x decompress xz files (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications > Rocky 9.x decompress xz files To decompress .xz files on rocky linux we can use: # Install xz utilities #:<pre> #:: dnf -y install xz #:</pre> # Then decompress xz file using: #:<pre> #:: xz --decompress <filename> #:</pre> Refer: * https://computingforgeeks.com/how-to-extract-xz-files-on-linux/ Home...")
- 04:59, 12 November 2023 Saurabh talk contribs created page Rocky 9.x Reopening closed tabs in firefox (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications > Firefox browser > Reopening closed tabs in firefox Sometimes before closing the browser we may want to save all tabs to reopen them again later. Also a few times instead of closing another window we may close firefox browser along with all tabs....")
- 04:53, 12 November 2023 Saurabh talk contribs created page Rocky 9.x Firefox browser (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications > Firefox browser *Rocky 9.x Reopening closed tabs in firefox Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications > Firefox browser")
- 04:30, 15 October 2023 Saurabh talk contribs created page Windows 11 Enable clipboard history to allow pasting from multiple different clipboards (Created page with "Home > Windows > Windows 11 > Enable clipboard history to allow pasting from multiple different clipboards =Enable clipboard history in settings= It is possible to have more than one clipboard in Windows by enabling: # Go to Settings -> System -> Clipboard # Enable toggle buttom for clipboard history. Refer: * https://www.howtogeek.com/671222/how-to-enable-...")
- 05:53, 8 October 2023 Saurabh talk contribs created page Rocky 9.x Force rescan or check of xfs filesystem on reboot (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > File system management > Force rescan or check of xfs filesystem on reboot To force rescan or check of xfs filesystem on reboot use: # Edit /etc/fstab file and change values in last two columns to non-zero # Create a file using: #:<pre> #:: t...")
- 05:49, 8 October 2023 Saurabh talk contribs created page Rocky 9.x file system management (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > File system management *Rocky 9.x Force rescan or fsck of ext filesystem on reboot *Rocky 9.x Force rescan or check of xfs filesystem on reboot Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x file syst...")
- 05:42, 8 October 2023 Saurabh talk contribs created page Rocky 9.x Force rescan or fsck of ext filesystem on reboot (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > File system management > Force rescan or fsck of ext filesystem on reboot We may want to enforce fsck or checking of ext partition on reboot. For that use: <pre> tune2fs -c 1 /dev/sdXY </pre> The above will cause filesystem to get scanned on...")
- 05:16, 8 October 2023 Saurabh talk contribs created page CentOS 8.x migrate to CentOS 8.x Stream (Created page with "Home > CentOS > CentOS 8.x > System Administration > Package management > CentOS 8.x migrate to CentOS 8.x Stream If you have older CentOS 8 machines they wont work now as repositories have been discontinued. To make them usable, we can migrate from CentOS to CentOS 8.x stream using: # Change all repository configuration as follows ##...")
- 05:08, 8 October 2023 Saurabh talk contribs created page CentOS 8.x Control Web panel miscellaneous issues (Created page with "Home > CentOS > CentOS 8.x > Email servers > Control Web panel > Miscellaneous issues =Disable Excessive resource usage alerts for processes= Control web panel will send periodic alerts for processes using too much resources. For example for zabbix-agent2. To disable such alerts use: # SSH to server as root # Edit file '<tt>/etc/csf...")
- 06:27, 8 September 2023 Saurabh talk contribs created page Planning for migrating a firewall (Created page with "Home > Enterprise security devices or applications > Planning for migrating a firewall While coordinating on downtime / planning for migrating to a new firewall, it makes sense to have following information : # From when to when is the downtime? # Who is the contact person available during downtime to help with: #* Cable identification (ISP1 cable, LAN cable, etc.) locally on site #* Coordiante with local users on the site if and when services are...")
- 06:14, 8 September 2023 Saurabh talk contribs created page Paloalto URL filtering (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto URL filtering =Creating desired URL filtering policy= Clone the default URL filtering policy default and configure a URL filtering policy as per organization (Eg block violence sites). The meaning of category eg business is not explained anywhere on the interface and is left up to interpretation. However there is a check URL link. https://urlfiltering.paloalt...")
- 06:10, 8 September 2023 Saurabh talk contribs created page Paloalto troubleshooting options (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto troubleshooting options *Paloalto firewall packet capturing *Paltalto firewall Monitor Session Browser *Paltalto firewall Monitor allowed/denied traffic Home > Enterprise security devices or applications > Paloalto firewall > Paloalto troubleshooting options")
- 06:10, 8 September 2023 Saurabh talk contribs created page Paltalto firewall Monitor allowed/denied traffic (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto troubleshooting options > Paltalto firewall Monitor allowed/denied traffic Go to Monitor -> Logs -> Traffic. Here we filter for source/destination. Here unlike session monitoring we can see historic (Based on log storage capacity of firewall) sessions and whether they were allowed or denied. Example filter ( addr.dst in 192.168.0.0/24 ) Same as monitor ->...")
- 06:09, 8 September 2023 Saurabh talk contribs created page Paltalto firewall Monitor Session Browser (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto troubleshooting options > Paltalto firewall Monitor Session Browser We can monitor for sessions from specific source or to specific destinations to see whether they are even going through firewall. Once we go to Monitor -> Session Browser and configure filters. For filter click on any source / destination etc. listed and change the value. Example filter to s...")
- 06:06, 8 September 2023 Saurabh talk contribs created page Paloalto Policy based forwarding (PBF) (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto Policy based forwarding (PBF) On PBF note that: * We dont need PBF for incoming NAT reply packets. Using ECMP with symmetric return on router is enough. * Dont do PBF with a specific ISP when the same source machine LAN machine is NAT with public IP of other ISP. In that case reply packets try to use a different ISP (As per PBF) and configuration does not works...")
- 06:00, 8 September 2023 Saurabh talk contribs created page Paloalto using ECMP for active/active ISP connectivity (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > aloalto using ECMP for active/active ISP connectivity =Enabling ECMP= If organization has multiple ISPs then: # Enable ECMP in virtual router with symmetric return. We can enable up to 4 equal cost routes via ECMP # After commit check "runtime stats" local routing table of the device (Should be done on device, cant be done via panorama) and validate that we have default r...")
- 05:44, 8 September 2023 Saurabh talk contribs created page Paloalto NAT examples (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto NAT examples =NAT of public IP to private IP on a few ports= To NAT a public IP:port to private IP:port use: # Create WAN to WAN Security rule with destination as NATed public IP with all services and all ports # Create NAT rule from WAN to LAN with source IP as any and destination IP as WAN public IP. After NAT change the destination IP to LAN IP. Here in NAT...")
- 05:41, 8 September 2023 Saurabh talk contribs created page Paloalto Configure firewall for proxy DNS (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto Configure firewall for proxy DNS Palo Alto Networks firewalls can act as DNS servers for local users. By configuring DNS Proxy on the firewall, you can intercept DNS requests from internal clients and forward them to external DNS servers or resolve them locally. =Configure DNS proxy via setup and service route configuration= To check the DNS settings on a Palo A...")
- 05:34, 8 September 2023 Saurabh talk contribs created page Paloalto general notes or best practices (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto general notes or best practices =Add /32 netmask for a single IP= Adding netmask eg /32 for a single IP is important. Without this the policy / rule may get accepted and committed but does not works unless we add /32 netmask. This should be followed for all address objects without fail. Home > Enterprise security devices or applications >...")
- 04:43, 8 September 2023 Saurabh talk contribs created page Check cluster health via nagios plugin (Created page with "Home > Suse > SAP setup and maintenance > Check cluster health via nagios plugin We can monitor cluster health using nagios plugin using: '''Not tested in production''' #Create a plugin to be called via nrpe on the cluster host '<tt>/usr/lib64/nagios/plugins/cluster_check.sh</tt>' with: <source type="bash"> #!/bin/bash # Run crm status command and capture output crm_output=$(crm status 2>&1) # Check for error or warning in output, ignoring ca...")
- 04:31, 8 September 2023 Saurabh talk contribs created page Check cluster status via systemd service (Created page with "Home > Suse > SAP setup and maintenance > Check cluster status via systemd service We can check cluster status via a systemd script using: '''Not tested in production''' # Setup outgoing email via postfix on the system so that email can be sent using mail command via CentOS 8.x postfix send email through relay or smarthost with smtp authentication # Create a systemd script '<tt>/etc/systemd/system/cluster_status_check.service</tt>' with: <s...")
- 05:56, 19 July 2023 Saurabh talk contribs created page Rocky 9.x Add UEFI boot option in BIOS (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Add UEFI boot option in BIOS If for some reason UEFI boot option from BIOS for Rocky is removed and you want to add it again use: # Disable secure boot. This may require shimx64 efi image # Add a new option for Rocky pointing to '<tt>EFI/rocky/grubx64.efi</tt>' file under EFI boot partition # Eithe...")
- 10:47, 16 June 2023 Saurabh talk contribs created page Ubuntu 20.04 Zabbix agent installation (Created page with "Home > Ubuntu > Server or Desktop administration > Ubuntu 20.04 Zabbix agent installation To install Zabbix agent in Ubuntu 20.04 machine use: # Install Zabbix repository #:<pre> #:: wget https://repo.zabbix.com/zabbix/6.4/ubuntu/pool/main/z/zabbix-release/zabbix-release_6.4-1+ubuntu20.04_all.deb #:: dpkg -i zabbix-release_6.4-1+ubuntu20.04_all.deb #:: apt update #:</pre> # Install Zabbix agent using: #:<...")
- 08:39, 16 June 2023 Saurabh talk contribs created page Monitor esxi resource utilization via esxtop command (Created page with "Home > VMWare platform > VMWare vSphere or ESXi > Monitor esxi resource utilization via esxtop command esxtop is a command-line tool that provides real-time information about resource usage in your ESXi environment. It can provide you with a wealth of data on CPU, memory, disk, and network usage. Here's a step-by-step guide on how to use esxtop to monitor an ESXi host: # Connect to the ESXi host via SSH #: This assumes SSH to ESXi host is ena...")
- 07:50, 16 June 2023 Saurabh talk contribs created page Cisco ASA firewall (Created page with "Home > Enterprise security devices or applications > Cisco ASA firewall *Cisco ASA firewall basic initialization Home > Enterprise security devices or applications > Cisco ASA firewall")
- 07:50, 16 June 2023 Saurabh talk contribs created page Cisco ASA firewall basic initialization (Created page with "Home > Enterprise security devices or applications > Cisco ASA firewall > Basic initialization Consider requirement as follows to initialize a ASA firewall: * DMZ IP of 192.168.11.1/24 for servers * WAN public IP 1.1.11.213/30 for Internet * LAN IP of 192.168.100.1/24 for LAN users * Additional 192.168.10.0 subnet for LAN accessible via L3 switch 192.168.100.2 * Outgoing internet access for LAN users from...")
- 07:06, 16 June 2023 Saurabh talk contribs created page VMWare Platform Miscellaneous (Created page with "Home > VMWare platform > VMWare Platform Miscellaneous *VMWare Useful Links Home > VMWare platform > VMWare Platform Miscellaneous")
- 07:06, 16 June 2023 Saurabh talk contribs created page VMWare Useful Links (Created page with "Home > VMWare platform > VMWare Platform Miscellaneous > VMWare Useful Links We can use following useful links related to VMWare platform: ; Configuration Maximums : We can find out maximum limit eg no. of datastores, no. of hosts, no. of VLANs, etc. for any particular VMWare product version using https://configmax.esp.vmware.com/home ; Product Interopibility Matrix : We can check whether products will work together or not. Eg Whether a parti...")
- 06:52, 16 June 2023 Saurabh talk contribs created page Proxmox Change disk configuration of VM with snapshots (Created page with "Home > Debian > Proxmox virtual environment > Proxmox Change disk configuration of VM with snapshots In proxmox we can take snapshots of the VM. However, if we want to change existing disks (eg remove one hard-disk) and then add another new hard-disk then there is concern on how will snapshots be effective if a disk is removed / added. Thus, for a example requirement where we need to remove a old disk from a Linux VM and add a new disk with...")
- 08:53, 15 June 2023 Saurabh talk contribs created page Rocky 9.x Package management (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Package management *Rocky 9.x Erlang installation Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Package management")
- 08:53, 15 June 2023 Saurabh talk contribs created page Rocky 9.x Erlang installation (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Package management > Erlang installation At the time of this writing erlang package was not available as part of Rocky 9.x repos listed below: ; appstream : Rocky Linux 9 - AppStream ; baseos : Rocky Linux 9 - BaseOS ; epel : Extra Packages for Enterprise Linux 9 - x86_64 ; e...")
- 08:13, 15 June 2023 Saurabh talk contribs created page Paloalto give static management IP to new firewall (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto give static management IP to new firewall After deploying a new virtual or physical palo-alto firewall use following on console to assign management IP: # Login with admin/admin #: Note that it may not work immediately. You may have to wait 5-10 minutes for it to work # During first login firewall will force to change default admin password # Then use below to as...")
- 07:57, 15 June 2023 Saurabh talk contribs created page Rocky 9.x Upgrade Rocky 8.x to Rocky 9.x (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Upgrade Rocky 8.x to Rocky 9.x To upgrade from Rocky 8 to Rocky 9 use: # Ensure sufficient free space in / before proceeding # Go to URL https://download.rockylinux.org/pub/rocky/9/BaseOS/x86_64/os/Packages/r/ # Note package names for rocky-release, rocky-repos and rocky-gpg-keys. Eg at time of t...")
- 07:55, 15 June 2023 Saurabh talk contribs created page Rocky 9.x Upgrade from CentOS Stream to Rocky (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Upgrade from CentOS Stream to Rocky The below steps would work both on CentOS Stream 8 and CentOS Stream 9, to convert them to Rocky 8.x or Rocky 9.x appropriately. # Ensure sufficient free space in / before proceeding # Update to latest packages in CentOS Stream using: #:<pre> #:: dnf updat...")
- 07:22, 15 June 2023 Saurabh talk contribs created page Rocky 9.x Information tools (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Information tools *Rocky 9.x atop '''There is older information on other tools at Information tools''' Home > Rocky Linux or CentOS > Rocky Linux 9.x > Information tools")
- 07:22, 15 June 2023 Saurabh talk contribs created page Rocky 9.x atop (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Information tools > atop =About atop= Atop is a more comprehensive monitoring tool. It looks at CPU, RAM, hdd, etc. all parameters while monitoring. This can be useful if combination of various parameters need to be monitored using same tool. To start atop use: <pre> atop </pre> =Using atop for system activity recording similar to sar= Atop can...")
- 07:11, 15 June 2023 Saurabh talk contribs created page Rocky 9.x Syslog servers (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Syslog servers *Rocky 9.x rsyslog server Home > Rocky Linux or CentOS > Rocky Linux 9.x > Syslog servers")
- 07:11, 15 June 2023 Saurabh talk contribs created page Rocky 9.x rsyslog server (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Syslog servers > rsyslog server *Rocky 9.x Setup rsyslog server for accepting remote device logs '''There are older articles on rsyslog at:''' Rsyslog configuration Home > Rocky Linux or CentOS > Rocky Linux 9.x > Syslog servers > rsyslog server")
- 07:11, 15 June 2023 Saurabh talk contribs created page Rocky 9.x Setup rsyslog server for accepting remote device logs (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Syslog servers > rsyslog server > Setup rsyslog server for accepting remote device logs To setup a new rsyslog server on Rocky 9.x use: # Install rsyslog package via: #:<pre> #:: dnf -y install rsyslog #:</pre> # Disable SELinux (setenforce 0, edit /etc/sysconfig/selinux) # Di...")
- 06:58, 15 June 2023 Saurabh talk contribs created page Sophos Connect to passive firewall when two firewall are in active/passive HA (Created page with "Home > Enterprise security devices or applications > Sophos Firewall or IPS > Sophos Connect to passive firewall when two firewall are in active/passive HA When two firewalls are in active/passive HA, if we connect to LAN/WAN IPs over https or ssh, we get connected only to active firewall. If we want to check something specific about passive firewall then we can ssh to passive firewall from active firewall. Thus, first we need to SSH to activ...")
- 11:52, 14 June 2023 Saurabh talk contribs created page Enable IPv6 and IGMP snooping on VLAN 3939 required for VxRail (Created page with "Home > VMWare platform > VxRail > Enable IPv6 and IGMP snooping on VLAN 3939 required for VxRail VxRail by default requires VLAN 3939 for nodes to discover each other. Ideally on this VLAN we should enable IGMP snooping and IPv6. The same can be done for a few switch makes as follows: =Dell switch= <pre> config t ip igmp snooping enable ipv6 mld snooping enable exit show ipv6 mld snooping interface vlan 3939 </pre> =Aruba or HP...")
- 13:39, 11 June 2023 Saurabh talk contribs created page Panorama NAT examples (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Panorama NAT examples =NAT from public IP to private IP via panorama only for a specific destination= When packets are coming from a specific WAN IP (Src-pub-IP1) and going to a specific WAN public IP (dst-pub-IP2) and need to be translated to a LANIP (dst-priv-IP3) for a specific service on port (service-port1) then we need to do following configuration in panorama: ==Pol...")
- 07:22, 11 June 2023 Saurabh talk contribs created page Managing windows services using sc command (Created page with "Home > Windows > Windows Desktop Tools or Utilities > Managing windows services using sc command Normally we can go to Services option in control panel (or under computer management) to look at status of various services and start/stop them. However there is also option to start/stop service via commandline. =Finding name of service= Look at servicename in properties of service when opened using services under control panel =Start service fr...")
- 07:14, 11 June 2023 Saurabh talk contribs created page CentOS 8.x Unattended nomachine (Created page with "Home > CentOS > CentOS 8.x > CentOS 8.x remote access > nomachine > Unattended nomachine In case of machine which is only booted but no graphical user login has been done yet, nomachine remote may not work. In such cases if nomachine is leading to blank screen then try: # Edit '<tt>/usr/NX/etc/server.cfg</tt>' and set: #:<pre> #:: CreateDisplay 1 #:: DisplayOwner "saurabh" #:</pre>...")
- 07:08, 11 June 2023 Saurabh talk contribs created page Rocky 8.x New laptop OS configuration (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > System Administration > Rocky 8.x New laptop OS configuration =OS installation= # Prepare bootable Rocky Linux 8 USB using: #:<pre> #:: dd if=Rocky-8.7-x86_64-dvd1.iso of=/dev/sdd #:: sync #:</pre> #::'''Assumes umount /dev/sdd* is done and that /dev/sdd does not has any critical data''' before itself. #: This can also be done using Rufus in Windows by using dd...")
- 05:41, 11 June 2023 Saurabh talk contribs created page VCenter 6.7 or 7 certificate expiry leading to 503 service not available error (Created page with "Home > VMWare platform > VMWare vCenter > vCenter 6.7 or 7 certificate expiry leading to 503 service not available error If vCenter internal certificates expire we may get 503 service unavailable error or other errors as shown at VMWare KB https://kb.vmware.com/s/article/76719 To solve this use: # You can validate whether you have this issue or not via steps explained at https://kb.vmware.com/s/article/79248 ## Downlooad checksts script from...")
- 05:05, 11 June 2023 Saurabh talk contribs created page Rocky 9.x System Administration (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration *Rocky 9.x New machine configuration Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration")
- 05:05, 11 June 2023 Saurabh talk contribs created page Rocky 9.x New machine configuration (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > New machine configuration *Rocky 9.x Configure new laptop for personal use Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > New machine configuration")
- 05:05, 11 June 2023 Saurabh talk contribs created page Rocky 9.x Configure new laptop for personal use (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > New machine configuration > Configure new laptop for personal use =OS installation= # Prepare bootable Rocky Linux 9 USB using: #:<pre> #:: dd if=Rocky-9.0-x86_64-dvd.iso of=/dev/sdd #:: sync #:</pre> #::'''Assumes umount /dev/sdd* is done and that /d...")
- 11:26, 31 May 2023 Saurabh talk contribs created page Comparing MDM with DLP with End-point security (Created page with "Home > Security tips > Comparing MDM with DLP with End-point security Endpoint Security, Data Leak Prevention (DLP), and Mobile Device Management (MDM) are three distinct but complementary technologies that address different aspects of security in an organization. Here's a comparison of these three and their typical use cases: =Endpoint Security= This focuses on securing endpoints, or end-user devices like desktops, laptops, and mobile devices. En...")
- 11:06, 31 May 2023 Saurabh talk contribs created page Generate new CSR by referring existing details from current certificate including private key (Created page with "Home > Security tips > Generate new CSR by referring existing details from current certificate including private key This internally refers Openssl. '''This is not fully tested.''' To generate a new CSR from existing certificate and key, then sign it and then import it use: # On existing server with certificate and key, open mmc -> Certificate # Export existing certificate with key in pfx format. #: Need to give a password while exporting...")
- 06:40, 24 May 2023 Saurabh talk contribs created page Ubuntu HPC Create new user (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > Create new user Once HPC setup is done properly, to create any new user (eg user3) please use below steps: #Create user using: #:<pre> #:: useradd -m -d /export/home/user3 -s /bin/bash user3 #:: passwd user3 #:</pre> #Create SSH key and configure them as authorized using: #:<pre> #:: su - user3 #:: ssh-keygen #:: cat ~/.ss...")
- 05:01, 22 May 2023 Saurabh talk contribs created page Executing powershell script on Windows machine (Created page with "Home > Windows > Windows Desktop Tools or Utilities > Executing powershell script on Windows machine =Normal execution of powershell script= To execute powershell script in Windows use: * Right click on powershell script and use "Run with powershell" option OR * Open a powershell Window. Run powershell script with full / relative path. Eg "cd C:\Users\Example\Downloads & .\Script1.ps" =Changing powershell Execution Policy= However, executio...")
- 10:51, 19 May 2023 Saurabh talk contribs created page Rocky 8.x GIMP (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications > GIMP =GIMP shortcuts= We can use following shortcuts in GIMP: ; p paintbrush (Tools -> Paint Tools -> Paint Brush) : We can click to paint using selected brush. : Brush selection - Windows -> Dockable Dialogs -> Tool options : Drawing Line - If we click at a point and then go to other point. On other po...")
- 10:18, 19 May 2023 Saurabh talk contribs created page Windows 10 Enable very long file paths (Created page with "Home > Windows > Windows 10 > Enable very long file paths To enable very long paths in Windows use: # Open registry using '<tt>regedit.exe</tt>' ## Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem ## Edit (or create new if required) LongPathsEnabled as 32-bit D-Word value ## Set the value for LongPathsEnabled to 1. # In case of domain environments also open Group Policy Editor '<tt>gped...")
- 07:34, 17 May 2023 Saurabh talk contribs created page Simple while loop with count in shell script (Created page with "Home > Shell scripting > Useful bash shell scripts > Simple while loop with count in shell script If we need to execute something specific no. of times, we can use while loop with count such as: <pre> q=0; while q -lt 3 ; do ((q++)); echo $q; done </pre> Here update value of limit from 3 to the desired number of loop executions. Also instead of echo $q; put the command to be executed again and again. For example to generate 10 random pa...")
- 07:30, 17 May 2023 Saurabh talk contribs created page Remotely change Windows password (Created page with "Home > Windows > Windows Desktop Tools or Utilities > Remotely change Windows password Normally for safety change password option comes after we press 'Ctrl+Alt+Del'. This cannot be done remotely as the sequence would get consumed by local system, instead of it being transmitted to remote machine over remote desktop. In such cases to change password use: # Create a new shortcut with target value of: #:<pre> #:: explorer.exe shell:::{2559a1f2-...")
- 07:17, 17 May 2023 Saurabh talk contribs created page Paloalto firewall captive portal (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Captive Portal For captive portal via AD we need to add a LDAP server, create group mapping, create authentication profile and optionally create authentication sequence as explained at Paloalto firewall AD integration. Here for captive portal select appropriate AD Group eg "Captive Portal Users" instead of VPN related group as explain...")
- 06:51, 17 May 2023 Saurabh talk contribs created page Paloalto firewall AD integration (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > AD integration To integrate palo-alto firewall with AD use following steps: # Finding base DN of AD and also DN of authenticating service user ## Login into system connected to AD and open "Active Directory Users and Computers". ## Enable View -> "Advanced Features". Without this we cannot see LDAP attributed such as DN required for integr...")
- 05:45, 17 May 2023 Saurabh talk contribs created page Microsoft Exchange smart host or Send connector settings (Created page with "Home > Windows > Microsoft Exchange Server > Smart host or Send connector settings It might be required to send outgoing emails to a particular domain (or all outgoing emails) via a SMTP Gateway / Smart host or Send connector. To configure the same (or view existing configuration) use: # Login into exchange admin center via Web UI # Go to "Mail Flow" -> "Send connectors" # Here we can ei...")
- 05:37, 17 May 2023 Saurabh talk contribs created page Ubuntu disable automatic updates (Created page with "Home > Ubuntu > Disable automatic updates =Disable automatic-update via CLI= We can disable automatic update in Ubuntu via CLI using: # Edit '<tt>/etc/apt/apt.conf.d/20auto-upgrades</tt>' so that it has: <source type=shell> APT::Periodic::Update-Package-Lists "0"; APT::Periodic::Download-Upgradeable-Packages "0"; APT::Periodic::AutocleanInterval "0"; APT::Periodic::Unattended-Upgrade "0"; </source> =Disable autom...")
- 12:33, 12 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Move backups to DR (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Move backups to DR == Create storage pool for offsite pool == #Create storage pool for offsite pool #:<pre> #::DEFINE STGPOOL <offsite-tape-storage-pool-name> LTOCLASS pooltype=copy description="Description for the Offsite tape pool" maxscratch=2 collocate...")
- 10:18, 12 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Administrative configuration backup (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Administrative configuration backup #Login to dsmadmc console #:<pre> #::> dsmadmc #::> DEFINE SCRIPT SP_CONF DESCRIPTION='Backup SP devconf and volhist file' #::> UPDATE SCRIPT SP_CONF "backup devconf file=/spdata/spback/devconf.out" #::>...")
- 08:19, 12 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Reports configuration (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Reports configuration #Schedule information #:<pre> #::SELECT associations.domain_name, associations.node_name, associations.schedule_name,client_schedules.description, client_schedules.action, client_schedules.options,client_schedules.objects, client_sc...")
- 07:29, 12 May 2023 Saurabh talk contribs moved page RHEL 8.x Spectrum Protect Configure Tape and Define the class to RHEL 8.x Spectrum Protect Configure Tape, Define the class and storage pool creation
- 07:18, 12 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Backup Archive restoration procedure (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Backup Archive restoration procedure #Login to the webgui client <https://<ipaddress>:9081/bagui> #Go to Retrieve tab #Click on the latest backup #Go to the location of file / folder to restore #Select the file / folder and click the uparr...")
- 06:21, 12 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Web client installation in RHEL client (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Web client installation in RHEL client #On Backup server, create sprestore user #:<pre> #::dsmadmc #::register admin sprestore admin123 sessionsecurity=trans #:</pre> #On RHEL client install below packages #:<pre> #::yum localinstall gsk...")
- 06:07, 12 May 2023 Saurabh talk contribs moved page RHEL 8.x Spectrum Protect Backup Agent installation in client to RHEL 8.x Spectrum Protect Backup Agent installation in RHEL client
- 07:29, 11 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Miscellaneous (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Miscellaneous == Configure admin password to never expires == #Configure admin password to never expires #:<pre> #::update admin <username> passexp=0 sessionsecurity=TRANSitional #::Ex: #::update admin admin passexp=0 sessionsecurity=TRANSitional #:</pre> Ma...")
- 07:50, 10 May 2023 Saurabh talk contribs created page Rocky 8.x LibreOffice Calc Rows auto-number (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications > LibreOffice Calc > Rows auto-number In case of rows requiring numbering such as Serial No with values 1,2,3,4, etc. instead of typing the numeric value if we use formula <pre> =Row(A2)-1 </pre> For second row, 1st column to have number 1. Then if...")
- 05:40, 10 May 2023 Saurabh talk contribs created page Rocky 8.x LibreOffice Calc (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications > LibreOffice Calc *Rocky 8.x LibreOffice Calc Rows auto-number There are older articles on this at Libreoffice calc Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications > Rocky 8.x LibreOffic...")
- 06:43, 9 May 2023 Saurabh talk contribs created page Enable automatic power on for synology NAS after power is restored (Created page with "Home > Storage server > Synology NAS > Enable automatic power on for synology NAS after power is restored Normally Synology NAS remains powered off, if power fails and then is restored. However, if you want NAS to power-on automatically after power is restored use: # Login into NAS Web UI # Go to Control Panel -> "Hardware and Power" # Under "Power Recovery" -> Enable "Restart automatically when power supply issue is fixed" Refer: * https://...")
- 06:41, 9 May 2023 Saurabh talk contribs created page Synology NAS (Created page with "Home > Storage server > Synology NAS *Enable automatic power on for synology NAS after power is restored")
- 03:18, 8 May 2023 Saurabh talk contribs created page Paloalto firewall packet capturing (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto firewall packet capturing In case of complex issues packet capturing might give considerable insight. To capture packets on paloalto firewall use: # Go to Monitor -> Packet capture # First define the filters for packet capturing. These filters use source / destination IP, protocol number (eg 1 for ICMP), IP or not-IP, interface name, etc. parameters. There are...")
- 03:11, 8 May 2023 Saurabh talk contribs created page Paloalto firewall (Created page with "Home > Enterprise security devices or applications > Paloalto firewall *Paloalto firewall Configure dual ISP dual site-to-site IPSec VPN tunnel failover Home > Enterprise security devices or applications > Paloalto firewall")
- 03:11, 8 May 2023 Saurabh talk contribs created page Paloalto firewall Configure dual ISP dual site-to-site IPSec VPN tunnel failover (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Configure dual ISP dual site-to-site IPSec VPN tunnel failover It is possible to have two site-to-site tunnels between two locations with matching proxy-IDs (Subnets). In this case the goal is to failover to second tunnel, if first IPSec tunnel is down due to ISP issue at either end. To conf...")
- 02:58, 8 May 2023 Saurabh talk contribs created page Microsoft Exchange Notifications Broker Service (Created page with "Home > Windows > Microsoft Exchange Server > Microsoft Exchange Notifications Broker Service Microsoft Exchange Notifications Broker Service is designed to run for very short period (eg 30 seconds) on OS boot and then stop. Hence we may see alerts for a service which is configured to run automatically on boot, but is in stopped state in monitoring tools (eg Zabbix) or in Server Manager. In case of monitoring tool use too...")
- 02:54, 8 May 2023 Saurabh talk contribs created page Check hard-disk for bad sectors (Created page with " Home > Hardware > Check hard-disk for bad sectors To check hard-disk for bad sectors, we can try and boot using Seagate SeaTools live CD ( https://www.seagate.com/in/en/support/downloads/seatools/ ) and then scan the disk for errors. This tools works properly even for non-seagate disks also at least in terms of testing for bad blocks. This would only work if the disk is directly readable by OS including SMART. This will not work in case of s...")
- 02:44, 8 May 2023 Saurabh talk contribs created page CentOS 8.x Zabbix Email notifications setup (Created page with "Home > CentOS > CentOS 8.x > Monitoring > Zabbix > Email notifications setup To receive email notifications about issues from Zabbix use: # Configure outgoing emails from Zabbix server using appropriate method eg CentOS 8.x postfix send email through relay or smarthost with smtp authentication # Login into Zabbix Web UI using Admin account # Go to Ad...")
- 08:12, 7 May 2023 Saurabh talk contribs created page CIS Benchmarks (Created page with "Home > Security tips > CIS Benchmarks We can go to https://www.cisecurity.org/cis-benchmarks/ and get benchmarks via email link for all main stream OS. These Benchmark are very exhaustive and cover exact steps to help in hardening a particular flavor of Linux or Windows. Download link might be https://downloads.cisecurity.org/#/ Home > Security tips > CIS Benchmarks")
- 08:04, 7 May 2023 Saurabh talk contribs created page NTP client configuration in Windows OS (Created page with "Home > Windows > Windows Desktop Tools or Utilities > NTP client configuration in Windows OS While in Windows via GUI we can only enable / disable NTP, various NTP related configuration can be done / viewed via command-line. See https://learn.microsoft.com/en-us/windows-server/networking/windows-time-service/windows-time-service-tools-and-settings?source=recommendations =Check existing NTP configuration= We can check NTP configuration via: <p...")
- 07:45, 7 May 2023 Saurabh talk contribs created page Rocky 8.x Zimbra Connect to Zimbra internal LDAP externally (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Email servers > Zimbra > Connect to Zimbra internal LDAP externally To connect to Zimbra LDAP externally: # Enable access to server via network firewall (OR Cloud firewall) # Enable access to port 389 of Zimbra server via firewalld: #:<pre> #:: firewall-cmd --zone=public --ad...")
- 07:36, 7 May 2023 Saurabh talk contribs created page Rocky 8.x Email Servers Zimbra (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Email servers > Zimbra *Rocky 8.x Zimbra Connect to Zimbra internal LDAP externally There are older articles on Zimbra at: *CentOS 8.x Zimbra *CentOS 7.x Zimbra configuration *Zimbra server configuration Home > Rocky Linux or CentOS > Rocky Linux 8.x > Email servers > ...")
- 04:52, 6 May 2023 Saurabh talk contribs created page Rocky 8.x setfacl and getfacl based permissions (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > System Administration > setfacl and getfacl based permissions Normally in Linux permissions are configured via User owner, Group owner and Others via read, write and execute permissions bits set for each type of access. However, if we have complex permission requirements then it is not possible to achieve the sam...")
- 04:44, 6 May 2023 Saurabh talk contribs created page Windows 11 (Created page with "Home > Windows > Windows 11 *Windows 11 show windows side by side Home > Windows > Windows 11")
- 04:43, 6 May 2023 Saurabh talk contribs created page Windows 11 show windows side by side (Created page with "Home > Windows > Windows 11 > Windows 11 show windows side by side In older version of Windows we could use 'Shift + Right click' in taskbar and get option to align windows side by side, cascaded, etc. However, in Windows 11 we need to hover over the maximize button in a window. While hovering we will get option to where should we place the window and we can click on the location to resize and place window accordingly. Refer: - https://answ...")
- 04:09, 6 May 2023 Saurabh talk contribs created page Windows 10 Getting IP address of the client connected to machine over RDP (Created page with "Home > Windows > Windows 10 > Windows 10 Getting IP address of the client connected to machine over RDP To know the IP address of the client connected to current Windows machine via RDP use: # Open Event viewer. This can be accessed via "Computer Management" # Go to Applications and Services Logs -> Microsoft -> Windows -> TerminalServices-LocalSessionManager # In the logs look for Source Network Address Refer: https://stackoverflow.com/quest...")
- 04:05, 6 May 2023 Saurabh talk contribs moved page Delete Recovery partition in Windows 10 to Windows 10 Delete Recovery partition
- 04:02, 6 May 2023 Saurabh talk contribs created page Rocky 8.x openconnect (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications > openconnect *Rocky 8.x openconnect to connect to palo alto global protect VPN Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications > openconnect")
- 04:02, 6 May 2023 Saurabh talk contribs created page Rocky 8.x openconnect to connect to palo alto global protect VPN (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications > openconnect > Connect to palo alto global protect VPN To connect to a palo-alto global protect VPN we only need to know the VPN server public IP / FQDN (Firewall WAN interface IP where VPN is enabled). Then connect using: <pre> ope...")
- 07:52, 3 May 2023 Saurabh talk contribs moved page Spectrum Protect Server Installation to RHEL 8.x Spectrum Protect Server Installation
- 07:50, 3 May 2023 Saurabh talk contribs moved page Spectrum Protect backup agent installation in Backup Server to RHEL 8.x Spectrum Protect backup agent installation in Backup Server
- 05:34, 3 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Backup schedule status commands (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Backup schedule status commands #On the backup server, open backup console #:<pre> #::dsmadmc #:</pre> #Check How much data backed up in last 24 hours #:<pre> #::> SELECT entity, CAST(FLOAT(SUM(bytes)) / 1024 / 1024 / 1024 AS DECIMAL(8,2)) as...")
- 12:42, 2 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Storage pool modification (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Storage pool modification #Update the next storage pool #:<pre> #::> UPDATE STGPOOL DEVQADBPOOL NEXT=DEVQALTOPOOL #:</pre> #If any storage pool data needs update #:<pre> #::> UPDATE STGPOOL DEVQADBPOOL MIGD=1 MIGC=no #:</pre> #If pool data migrate to...")
- 12:36, 2 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Storage pool creation for Primary Secondary Databases (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Storage pool creation for Primary Secondary Databases #On the backup server, open backup console #:<pre> #::dsmadmc #:</pre> #LTO pool for Databases #:<pre> #::> DEFINE STGPOOL HANADBPOOL LTOCLASS pooltype=PRIMARY descrip...")
- 12:32, 2 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Configure Tape and Define the class (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Configure Tape and Define the class #Tape installation files are #::lin_tape-3.0.59-1.src.rpm #::lin_taped-3.0.59-rhel8.ppc64le.rpm #Rebuild the src rpm #:<pre> #::rpmbuild --rebuild lin_tape-3.0.59-1.src.rpm #:</pre> #Install the rpm files...")
- 12:20, 2 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Commands description (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Commands description #To find the device class #:<pre> #::> q dev #:</pre> #For checking the disk / tape libraries #:<pre> #::> q library #:</pre> #For checking the tape volumes #:<pre> #::> q libvol #:</pre> #For checking paths of tape library #:<pre> #:...")
- 09:32, 2 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Backup Agent installation in client (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Backup Agent installation in client == Register the client in the Backup Management server == #On the backup server, open backup console #:<pre> #::dsmadmc #:</pre> #Register the client in the Backup Management server #:<pre> #::> REGIST...")
- 09:24, 2 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Schedule the Backups (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Schedule the Backups #On the backup server, open backup console #:<pre> #:: dsmadmc #:</pre> #Schedule Daily backup #:<pre> #::> DEFINE SCHEDULE <domain> <clientname_DAILY_BK> TYPE=CLIENT ACTION=ARCHIVE OBJECTS='"/<mount-point1>/" "/<mount-point2>/" /<mou...")
- 09:08, 2 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Define storage pool for files folders (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Define storage pool for files folders #On the backup server, open backup console #:<pre> #::dsmadmc #:</pre> #Storage pool for Daily backups #:<pre> #::> DEFINE STGPOOL FSDAILYPOOL DRIVEFILECLASS pooltype=PRIMARY description="Storage pool...")
- 08:56, 2 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Define Storage pool, Domain and Policyset (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > Spectrum Protect Define Storage pool, Domain and Policyset Define storage pool, domain, policyset and activate #On the backup server, open backup console #:<pre> #::dsmadmc #:</pre> #Define storage pool #:<pre> #::> DEFINE STGPOOL <poolname> <devicecl...")
- 08:54, 2 May 2023 Saurabh talk contribs moved page RHEL 8.x Spectrum Protect Configuration to RHEL 8.x Spectrum Protect Define Device class for drive
- 08:19, 2 May 2023 Saurabh talk contribs created page RHEL 8.x Spectrum Protect Configuration (Created page with "Home > RHEL > RHEL 8.x > Backup tools > Spectrum Protect Backup > [[RHEL 8.x Spectrum Protect Configuration|Spectrum Protect Configuration] == Define device class for drive == This document assumes mount points are available to the OS. #Login to backup server via SSH #Change permissions for drive mount points #:<pre> #::chown spinst1:spsrvrs /spdata1 #::chown spinst1:spsrvrs /spdata2 #:...")
- 06:54, 2 May 2023 Saurabh talk contribs moved page Spectrum Protect Theory to RHEL 8.x Spectrum Protect Theory
- 04:44, 1 May 2023 Saurabh talk contribs moved page Spectrum Protect Backup to RHEL 8.x Spectrum Protect Backup (Adding OS prefix)
- 13:12, 27 April 2023 Saurabh talk contribs created page Spectrum Protect backup agent installation in Backup Server (Created page with "Home > RHEL > RHEL 8.x > RHEL 8.x Backup tools > Spectrum Protect Backup > Spectrum Protect backup agent installation in Backup Server #Copy the Spectrum protect backup agent file to /root (or other appropriate) directory in Backup server #Login to Backup server via SSH #Extract the installation file #:<pre> #:: mkdir /root/agent-temp #:: cd /root/agent-temp #:: tar xf ../8.1.14.0-TIV-TSMBAC-LinuxX86.tar #:</pre> #Install the agent #:<p...")
- 11:20, 27 April 2023 Saurabh talk contribs created page Spectrum Protect Server Installation (Created page with "Home > RHEL > RHEL 8.x > RHEL 8.x Backup tools > Spectrum Protect Backup > Spectrum Protect Theory > Spectrum Protect Server Installation == Minimum Requirements == # RHEL8 OS (CentOS not supported) #: Ensure GUI (X Windows System) is available. # Java JRE should be install #:<pre> #:: yum install java #:</pre> #Disable SELINUX and Firewall #Set proper hostname. This cannot be changed later. Ensure the same resolves to LAN IP in...")
- 10:30, 27 April 2023 Saurabh talk contribs created page Spectrum Protect Theory (Created page with "Home > RHEL > RHEL 8.x > RHEL 8.x Backup tools > Spectrum Protect Backup > Spectrum Protect Theory ; Device class: The type of storage device that can use the volumes that are defined in a sequential-access or random-access storage pool. Each device class of removable media type is associated with a single library. ; DISK device class: In a DISK device type of storage pool, data is stored in random access disk blocks. You can use cachi...")
- 07:33, 27 April 2023 Saurabh talk contribs created page Rocky 8.x nslookup (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications > nslookup nslookup can be used to do DNS query of different types A, AAAA, MX, PTR (Reverse) etc. to default / specific DNS server =-debug option= Similar to Trace option in dig we can use '<tt>-debug</tt>' while running nslookup query to get entir...")
- 07:25, 25 April 2023 Saurabh talk contribs created page Spectrum Protect Backup (Created page with "Home > RHEL > RHEL 8.x > RHEL 8.x Backup tools > Spectrum Protect Backup Home > RHEL > RHEL 8.x > RHEL 8.x Backup tools > Spectrum Protect Backup")
- 06:19, 25 April 2023 Saurabh talk contribs created page RHEL 8.x Backup tools (Created page with "Home > RHEL > RHEL 8.x > RHEL 8.x Backup tools *RHEL 8.x Spectrum Protect Backup")
- 06:15, 25 April 2023 Saurabh talk contribs created page RHEL 8.x (Created page with "Home > RHEL > RHEL 8.x *RHEL 8.x Backup tools Home > RHEL > RHEL 8.x")
- 05:30, 18 April 2023 Saurabh talk contribs created page Datastore corruption issue resolution (Created page with "Home > VMWare platform > VMWare vSphere or ESXi > Datastore corruption issue resolution '''The below is not applicable for vSAN. Use this only for normal VMFS datastores'''. It is possible to have datastore corruption especially when underlying storage becomes inaccessible to ESXi host temporarily while there are VMs running from given datastore. When such incidents happen we can see some log lines related to datastore corruption in '<tt>/va...")
- 08:56, 12 April 2023 Saurabh talk contribs created page Rocky 8.x Email servers (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Email servers *Rocky 8.x Email Servers iRedmail Home > Rocky Linux or CentOS > Rocky Linux 8.x > Email servers")
- 08:56, 12 April 2023 Saurabh talk contribs created page Rocky 8.x Email Servers iRedmail (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Email servers > iRedmail *Rocky 8.x Email Servers iRedmail Setup vmail user mail forwarding via SQL Home > Rocky Linux or CentOS > Rocky Linux 8.x > Email servers > iRedmail")
- 08:56, 12 April 2023 Saurabh talk contribs created page Rocky 8.x Email Servers iRedmail Setup vmail user mail forwarding via SQL (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Email servers > iRedmail > Setup vmail user mail forwarding via SQL Similar to various email systems covered at CentOS 8.x email servers there is iRedMail system. In case of iRedMail unless we use professional version, we may not get option to set user fo...")
- 08:44, 12 April 2023 Saurabh talk contribs created page Disconnect or logoff from remote network share without reboot (Created page with "Home > Windows > Windows Desktop Tools or Utilities > Disconnect or logoff from remote network share without reboot Often if we access a Windows Share by typing its path in "Run" or Explorer, we get prompted for username/password (if share is password protected). This authentication seems to get cached till next reboot. If we want to remove a particular saved credential (eg if we have used our username / password on a co-worker machine to qui...")
- 08:20, 12 April 2023 Saurabh talk contribs created page Looking at email queues in Exchange (Created page with "Home > Windows > Microsoft Exchange Server > Looking at email queues in Exchange One of the important health check or troubleshooting tool for email systems is ability to look at various email queues. In case of exchange we can look at email queues via: # Open application "Exchange toolbox" # From Exchange toolbox open "Queue Viewer" tool Refer: * https://learn.microsoft.com/en-us/exchange/mail-flow/queues/queue-viewer?view=exchserver-2019...")
- 08:17, 12 April 2023 Saurabh talk contribs created page Event log error - The specified channel could not be found. Check channel configuration (15007) (Created page with "Home > Windows > Microsoft Exchange Server > Event log error - The specified channel could not be found. Check channel configuration (15007) It is possible then on Exchange Server event log export does not works and throws error: <pre> The specified channel could not be found. Check channel configuration (15007) </pre> especially for "Microsoft Exchange with Database Availability Group Events" To solve the issue use following steps: # Note do...")
- 08:17, 12 April 2023 Saurabh talk contribs created page Microsoft Exchange Server (Created page with "Home > Windows > Microsoft Exchange Server *Event log error - The specified channel could not be found. Check channel configuration (15007) Home > Windows > Microsoft Exchange Server")
- 08:03, 12 April 2023 Saurabh talk contribs created page Rocky 8.x Gnome keyboard shortcuts (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications > Gnome keyboard shortcuts ; Switching display options : If we want to switch between mirrored screen to display only going to first monitor to display going only to second monitor etc. we can use "Super + P" or "Windows + P". Refer https://askubuntu.com/questions/1056683/how-can-i-switch...")
- 10:30, 28 February 2023 Saurabh talk contribs created page Ubuntu HPC Execute parallel jobs (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > Execute parallel jobs #Login as user1 # Create '<tt>~/load.sh</tt>' file with the below information <source type="shell"> #! /bin/bash #PBS -N stressjob #PBS -q testq1 #PBS -V #PBS -l nodes=3 module load mpi/mpi-4.1.1 mpirun -host node1,node2,node3 -n 3 /usr/bin/stress --cpu 2 --vm 5 --vm-bytes 1G --timeout 60s </sour...")
- 10:20, 28 February 2023 Saurabh talk contribs created page Ubuntu HPC Configure PBS job scheduler (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > Configure PBS job scheduler #Login to master node via root. Add nodes to PBS. #:<pre> #:: qmgr #Further on Qmgr: prompt use below #:: #:: create node <node1> #:: create node <node2> #:</pre> #: This should be done for all compute nodes #Check PBS information. All three nodes should be visible #:<pre> #:: pbsno...")
- 10:16, 28 February 2023 Saurabh talk contribs created page Ubuntu HPC Setup PBS execution on compute nodes (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > Setup PBS execution on compute nodes To setup PBS execution on all compute nodes #Install pbs execution Debian package on all compute nodes using: #:<pre> #:: cd /export/apps/temp/openpbs_20.0.1.ubuntu_1804/ #:: dpkg -i openpbs-execution_20.0.1-1_amd64.deb #:</pre> #Configure master hostname in '<tt>/etc...")
- 09:13, 27 February 2023 Saurabh talk contribs created page Ubuntu HPC Setup PBS master on master node (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > Setup PBS master on master node Home > Ubuntu > HPC setup with openpbs and openmpi > Setup PBS master on master node")
- 05:01, 27 February 2023 Saurabh talk contribs created page Ubuntu HPC Install and Configure Modules (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > Install and Configure Modules #Create directory for modules path in master node share path #:<pre> #:: mkdir -p /export/modules/ #:</pre> #Configure mpi module file in master node ##Create directory for mpi ##:<pre> ##:: mkdir -p /export/modules/mpi ##:: cd /export/modules/mpi ##:</pre> ## Create mpi-4.1.1 modu...")
- 04:35, 27 February 2023 Saurabh talk contribs created page Ubuntu HPC Install Openmpi from master node (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > Install Openmpi from master node We can install OpenMPI using source code by using: #Create temporary directory for compilation of sources. Download openmpi tar ball and extract sources in temporary compilation folder. #:<pre> #:: mkdir -p /export/apps/temp #:: cd /export/apps/temp #:: wget https://www.open...")
- 04:46, 25 February 2023 Saurabh talk contribs created page Rocky 8.x Finding DHCP offer and options without changing actual interface settings (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > System Administration > Finding DHCP offer and options without changing actual interface settings It is possible to make DHCP request on an interface without changing any settings. This way we can find out what IP and other options such as DNS, lease-time etc. DHCP server provi...")
- 05:47, 23 February 2023 Saurabh talk contribs created page Ubuntu HPC NIS client setup on compute nodes (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > NIS client setup on compute nodes #Install NIS packages #:<pre> #:: apt -y install nis nscd #:</pre> #: During installation mention correct NIS domain as setup on master node. #Add below line in '<tt>/etc/yp.conf</tt>' file #:<pre> #:: domain <private-domain> server master #:</pre> #Add nis based re...")
- 05:26, 23 February 2023 Saurabh talk contribs created page Ubuntu HPC NIS server setup on master node (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > NIS server setup on master node #Install NIS packages and give nis domain name #:<pre> #:: apt -y install nis nscd #:</pre> #: During installation enter private domain name for NIS #Configure this server as NIS master server by editing '<tt>/etc/default/nis</tt>' and updating below two parameter values: #:<pr...")
- 04:32, 23 February 2023 Saurabh talk contribs created page Ubuntu HPC NTP client setup on compute nodes (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > NTP client setup on compute nodes To configure client nodes to take their time update from master use: #Install ntp package #:<pre> #:: apt install -y ntp ntpdate #:</pre> #Edit '<tt>/etc/ntp.conf</tt>' file and '''keep only master server''' as follows: #:<pre> #:: server master prefer iburst #:</pre> # Se...")
- 04:26, 23 February 2023 Saurabh talk contribs created page Ubuntu HPC NTP server setup on master node (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > NTP server setup on master node #Install ntp package #:<pre> #:: apt install -y ntp ntpdate #:</pre> #Edit '<tt>/etc/ntp.conf</tt>' file and append time.google.com server as follows: #:<pre> #:: server time.google.com #:</pre> # Set correct time on current system using: #:<pre> #:: ntpdate -b time.google.com...")
- 03:38, 23 February 2023 Saurabh talk contribs created page Ubuntu 20.04 Execute command at system boot using crontab (Created page with "Home > Ubuntu > Server or Desktop administration > Ubuntu 20.04 Execute command at system boot using crontab In case of Ubuntu 20.04 if we need to execute any command after system boot (the way used to happen via /etc/rc.d/rc.local long back), we can do the same via cron using: # Type below to open cron editing for current user (eg root) #:<pre> #:: crontab -e #:</pre> # In the cron file enter command to...")
- 09:19, 17 February 2023 Saurabh talk contribs created page Ubuntu HPC NFS client on compute nodes (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > NFS client on compute nodes #Install NFS client packages on compute node #:<pre> #:: apt install -y nfs-common #:</pre> #Create mount directory #:<pre> #:: mkdir /export #:</pre> #Mount master node /export directory in compute node via '<tt>/etc/fstab</tt>' using: #:<pre> #:: <masternodename>:/export /export...")
- 08:59, 17 February 2023 Saurabh talk contribs created page Ubuntu HPC DNS setup on compute node (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > DNS setup on compute node To configure correct DNS settings on compute node use: # First test DNS resolution via master using: #:<pre> #:: nslookup node<n>.<private-zone> <master-private-ip> #:</pre> # Then configure appropriate DNS and search domain using: #:<pre> #:: resolvectl domain <private-interface> <privat...")
- 08:53, 17 February 2023 Saurabh talk contribs created page Ubuntu HPC DNS setup on master node (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > DNS setup on master node The nodes in HPC cluster should resolve each other via both short name and FQDN. To help with host resolution centrally, we can setup DNS on master using: # Install bind9 package using: #:<pre> #:: apt -y install bind9 #:</pre> # Edit '<tt>/etc/bind/named.conf.options</tt>' to include:<sour...")
- 08:08, 17 February 2023 Saurabh talk contribs created page Ubuntu HPC master and compute node network setup (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > Master and compute node network setup After initial template is built using Ubuntu HPC Common setup of all HPC nodes, we need to differentiate between master and compute nodes from network perspective. # '''On compute nodes''' disable firewall using: #:<pre> #:: systemctl stop ufw #:: systemctl dis...")
- 07:51, 17 February 2023 Saurabh talk contribs moved page Ubuntu NFS server setup on master node to Ubuntu HPC NFS server setup on master node (Better naming)
- 07:48, 17 February 2023 Saurabh talk contribs created page Ubuntu NFS server setup on master node (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > NFS server setup on master node Create ext4 lvm partition with required space to be shared with clients. Mount created lvm partition on /export via UUID using /etc/fstab # Create home folder under /export #:<pre> #:: mkdir -p /export/home #:</pre> #Install NFS packages #:<pre> #:: apt install -y nfs-kernel-server...")
- 05:54, 15 February 2023 Saurabh talk contribs created page Ubuntu HPC Common setup of all HPC nodes (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > Common setup of all HPC nodes Plan is to create an Ubuntu 20.04 template using below steps. Then we can clone the template to master / execution nodes and configure those nodes individually separately. For common node (template) setup use: # Install Ubuntu 20.04 Desktop with most default values. Non-root user...")
- 05:45, 15 February 2023 Saurabh talk contribs created page Ubuntu HPC setup with openpbs and openmpi (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi *Ubuntu HPC Common setup of all HPC nodes Home > Ubuntu > HPC setup with openpbs and openmpi")
- 05:32, 15 February 2023 Saurabh talk contribs created page Ubuntu Server or Desktop administration (Created page with "Home > Ubuntu > Server or Desktop administration *Package management in Ubuntu *Installing android sdk in Ubuntu *Installing Ubuntu on LVM partition *Detecting RAID partitions using Ubuntu Live CD or USB *Configuring Samba service in Ubuntu *Configuring Ubuntu machine as LDAP client *Troubleshooting Ubuntu specific issues *Installing Java on Ubuntu 12.04 x86_64 Desktop *Add U...")
- 05:32, 15 February 2023 Saurabh talk contribs created page Ubuntu Hadoop cluster setup (Created page with "Home > Ubuntu > Hadoop cluster setup *Installing Hadoop 2.2.0 on single Ubuntu 12.04 x86_64 Desktop *Installing Hadoop 2.2.0 cluster on Ubuntu 12.04 x86_64 Desktops Home > Ubuntu > Hadoop cluster setup")
- 08:24, 1 February 2023 Saurabh talk contribs created page Fortinet firewall VPN configuration (Created page with "Home > Enterprise security devices or applications > Fortigate firewall > VPN configuration =Fortinet firewall SSL VPN configuration= To configure Remote SSL VPN in fortinet use: # Go to Network -> Interfaces. See the names of WAN and LAN interfaces. Assuming VPN users will connect from WAN and then once they are connected to VPN, they need LAN access. # Go to Network -> Static route and see the networ...")
- 07:46, 29 January 2023 Saurabh talk contribs created page Removing failed disk or disk group from vSAN cluster (Created page with "Home > VMWare platform > vMWare VSAN > Removing failed disk or disk group from vSAN cluster =Removing failed capacity disk= In case of a failed capacity disk we can remove it using: # Go to Cluster -> Configure -> Disk management and view all disks in cluster. We should be able to find a failed or inaccessible disk in cluster. # Once the ESXi host is identified put the host in maintenance mode using "Ensure accessibility" option. #...")
- 07:38, 29 January 2023 Saurabh talk contribs created page Fortinet firewall basics (Created page with "Home > Enterprise security devices or applications > Fortigate firewall > Bascis =Connecting to console port in Fortigate firewall= In fortigate firewall we can connect to console using 9600 Baud rate. After connecting to console login via admin to get access to command prompt. =Fortigate firewall command access= We can open command prompt based access to fortigate firewall after login into webUI. After login on top...")
- 03:15, 5 January 2023 Saurabh talk contribs created page Rocky 8.x Chrome Browser (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications > Chrome Browser *Rocky 8.x Chrome Browser solving zip file creation failed on drive.google.com")
- 03:15, 5 January 2023 Saurabh talk contribs created page Rocky 8.x Desktop tools or applications (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications *Rocky 8.x Chrome Browser")
- 03:14, 5 January 2023 Saurabh talk contribs created page Rocky 8.x Chrome Browser solving zip file creation failed on drive.google.com (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications > Chrome Browser > Rocky 8.x Chrome Browser solving zip file creation failed on drive.google.com Sometimes on drive.google.com download of folders along with sub-folders and files fails with failure of zip file creation. In such cases we can use following steps to solve the problem: # Open chro...")
- 05:05, 4 January 2023 Saurabh talk contribs created page Seeing spaces and tabs in vim (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Text Editors > vim > Seeing spaces and tabs in vim Normally we cannot differentiate between spaces and tabs in vim. However, if visualzing the difference between space and tab is important, we can use following: <pre> :set lcs=space:_,tab:>~ list </pre> Refer: * https://stackoverflow.com/questions/61221579/how-to-view-tabs-spaces-and-various-tab-rel...")
- 05:05, 4 January 2023 Saurabh talk contribs created page Rocky 8.x vim (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Text Editors > vim *Seeing spaces and tabs in vim '''There are older articles on vim at:''' *CentOS 7.x vim *Vim Home > Rocky Linux or CentOS > Rocky Linux 8.x > Text Editors > vim")
- 05:05, 4 January 2023 Saurabh talk contribs created page Rocky 8.x Text Editors (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Text Editors *Rocky 8.x vim Home > Rocky Linux or CentOS > Rocky Linux 8.x > Text Editors")
- 04:54, 23 December 2022 Saurabh talk contribs created page Restarting various Avamar services in Dell DP4400 (Created page with "Home > Backup server > Dell DP4400 > Restarting various Avamar services in Dell DP4400 In case when we login to ACM and we see services as stopped or failed related to Avamar, we can try to restart them via: # Login into ACM and see which services are having issues under avamar # SSH to avamar machine as admin user. #: If required perhaps default root password is avam@r # Use =dpnctl= to start / restart stopped services one by one. (gsan, mc...")
- 04:44, 23 December 2022 Saurabh talk contribs created page Dell DP4400 (Created page with "Home > Backup server > Dell DP4400 *Restarting various Avamar services in Dell DP4400")
- 04:45, 20 December 2022 Saurabh talk contribs created page Rocky 8.x gitlab install on a new machine (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > DevOps > Version Control > gitlab > gitlab install on a new machine To install gitlab on a Rocky 8.x machine use: # Ensure proper DNS based resolution for desired FQDN. #: Installing gitlab using IP address will not work # Configure the desired FQDN to resolve to LAN IP via /etc/hos...")
- 04:45, 20 December 2022 Saurabh talk contribs created page Rocky 8.x gitlab (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > DevOps > Version Control > gitlab *Rocky 8.x gitlab install on a new machine '''There are older articles on this at:''' *CentOS 7.x gitlab *Gitlab Home > Rocky Linux or CentOS > Rocky Linux 8.x > DevOps > Version Control > Rocky 8.x gitlab|...")
- 04:45, 20 December 2022 Saurabh talk contribs created page Rocky 8.x Version Control (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > DevOps > Version Control *Rocky 8.x gitlab Home > Rocky Linux or CentOS > Rocky Linux 8.x > DevOps > Version Control")
- 04:45, 20 December 2022 Saurabh talk contribs created page Rocky 8.x DevOps (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > DevOps *Rocky 8.x Version Control Home > Rocky Linux or CentOS > Rocky Linux 8.x > DevOps")
- 04:54, 14 December 2022 Saurabh talk contribs created page Solving VMs stuck on poweron or poweroff or reboot non-cancel able operations (Created page with "Home > VMWare platform > VMWare vSphere or ESXi > Solving VMs stuck on poweron or poweroff or reboot non-cancel able operations Sometimes a VM may get stuck in a operation such as power-on / power-off / reboot which cannot be cancelled. If VM is stuck in this state for fairly long time (eg more than 15 minutes) it is safe to assume that the operation is not going to succeed. In such cases we can kill the process using: # Find the ESXi host wh...")
- 07:32, 10 December 2022 Saurabh talk contribs created page Rocky 8.x RustDesk (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Remote Access > RustDesk =RustDesk Server installation= Install RustDesk on Rocky 8.x using: # Create an instance with public IP. # Map DNS to public IP (IPv4 / IPv6 or both) # Based on preference: #* Set hostname #* Configure history retention #* Add swap #* Configure postfix and logwatch # Install wget #:<pre> #:: dnf -y install wget #:</pre> # D...")
- 07:16, 10 December 2022 Saurabh talk contribs created page Rocky 8.x Remote Access (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Remote Access *Rocky 8.x RustDesk '''There are older articles on this at CentOS 8.x remote access''' Home > Rocky Linux or CentOS > Rocky Linux 8.x > Remote Access")
- 07:01, 10 December 2022 Saurabh talk contribs created page Figuring out where space is utilized in google account (Created page with "Home > Internet tips and tricks > Figuring out where space is utilized in google account We can open https://drive.google.com/ and see total / used space of individual google account. In case of organization account with fixed total pooled storage, we can only see used space and not total space of organization. If we are running out of space on an old account and want to know where the space is going (Gmail, Google Photos, Google drive, etc.) the...")
- 06:48, 10 December 2022 Saurabh talk contribs created page Rocky 8.x SSH client Connecting to old network devices with legacy protocols and ciphers (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > System Administration > SSH client > Connecting to old network devices with legacy protocols and ciphers If while connecting to a network device (eg TP-Link AP or switch) you get errors similar to '''one among''' below: <pre> Unable to negotiate wit...")
- 06:46, 10 December 2022 Saurabh talk contribs created page Rocky 8.x SSH client (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > System Administration > SSH client *Rocky 8.x SSH client Connecting to old network devices with legacy protocols and ciphers '''There are older articles on this at: CentOS 8.x SSH client'''")
- 06:45, 10 December 2022 Saurabh talk contribs created page Rocky 8.x System Administration (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > System Administration *Rocky 8.x SSH client")
- 06:45, 10 December 2022 Saurabh talk contribs created page Rocky Linux 8.x (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x *Rocky 8.x System Administration")
- 07:55, 15 October 2022 Saurabh talk contribs created page Convert date to different format using date command (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications > Convert date to different format using date command '''Older article on this is at Date''' =Convert date in human-readable format to seconds since epoch (1 Jan 1970)= May databases and log files may output timestamp in seconds since 1 Jan 1970 instead of using human-readable format. In such cases convert date to...")
- 07:42, 15 October 2022 Saurabh talk contribs created page Rocky 9.x Database servers (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Database servers *Rocky 9.0 Mariadb server Home > Rocky Linux or CentOS > Rocky Linux 9.x > Database servers")
- 07:42, 15 October 2022 Saurabh talk contribs created page Rocky 9.0 Mariadb server (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Database servers > Mariadb *Rocky 9.0 Mariadb Save SQL query output to a file Home > Rocky Linux or CentOS > Rocky Linux 9.x > Database servers > Mariadb")
- 07:41, 15 October 2022 Saurabh talk contribs created page Rocky 9.0 Mariadb Save SQL query output to a file (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Database servers > Mariadb > Save SQL query output to a file To save SQL query output to a file append the SQL query with: <pre> INTO OUTFILE '/tmp/output1.txt'; </pre> '''Note that above file may not be visible in /tmp. You may have to go to /tmp/systemd-private-<uid>-mariadb.service...")
- 06:20, 15 October 2022 Saurabh talk contribs created page Reset root password on vCenter 7.x (Created page with "Home > VMWare platform > VMWare vCenter > Reset root password on vCenter 7.x To reset forgotten root password for vCenter 7.x use: # If "administrator@vsphere.local" login is working and only root passwords needs to be reset then we can get vCenter VM console from vCenter itself. ## If administrator@vsphere.local password is also not known then Login into ESXi host where vCenter VM is present. ##: If there are multiple hosts we need to login in...")
- 05:43, 15 October 2022 Saurabh talk contribs created page Rocky 9.x Increase default PHP resources (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Web Servers > Increase default PHP resources Compared to default '<tt>/etc/php.ini</tt>' values use: <pre> max_execution_time = 600 max_input_time = 1200 memory_limit = 2560M post_max_size = 160M upload_max_filesize = 400M max_file_uploads = 400 max_input_vars = 10000 date.timezone = 'Asia/Kolkata' </pre> Further,...")
- 05:38, 15 October 2022 Saurabh talk contribs created page Rocky 9.x Configure apache web server for concurrency (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Web Servers > Apache > Configure for concurrency Concurrency is handled via mpm module. There are different types of mpm modules out of which only one can be used at a time. We can see currently enabled mpm module via: <pre> httpd -V | grep -i mpm </pre> We can see whic...")
- 05:31, 15 October 2022 Saurabh talk contribs created page Rocky 9.x Desktop tools and applications (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications *chown command Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications")
- 05:31, 15 October 2022 Saurabh talk contribs created page Chown command (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications > Chown command =Change ownership of symbolic links= Normally chown changes ownership of file / directory pointed by symbolic link. To change ownership of symbolic link itself we need to use '<tt>-h</tt>' option. For example <pre> chown -h <user>:<group> <symbolic-link-name.txt> </pre> Refer: * https://unix.stackexch...")
- 08:46, 7 October 2022 Saurabh talk contribs created page Rocky 9.x Owncloud upgrade by migrating to a new VM with updated version (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > File Sharing > Owncloud > Upgrade and Migrate To upgrade owncloud along with migrating to a new VM (Typically cloud or at least public) use: # Stop web server on old server. For example #:<pre> #:: /opt/owncloud-<ver>/ctlscript.sh stop apache #:</pre> # Take one full backup...")
- 06:47, 7 October 2022 Saurabh talk contribs created page Rocky 9.x Owncloud delete files via REST API via command line (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > File Sharing > Owncloud > Delete files via REST API via command line If there is need to delete file from CLI instead of using Web login / Desktop client then use: <pre> curl -u <owncloud-username>:<owncloud-password> -X DELETE https://<owncloud-fqdn-or-ip>/owncloud/remote.php/webdav/<p...")
- 06:44, 7 October 2022 Saurabh talk contribs created page Rocky 9.x Owncloud Manually moving DataDirectory (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > File Sharing > Owncloud > Manually moving DataDirectory We can change path of owncloud DataDirectory as follows: ('''Assuming moving from''' /var/www/owncloud '''to''' /mnt/owncloud ) # Enable maintenance mode. For example #:<pre> #:: cd /var/www/html/owncloud #:: sudo -u apache php -f occ mainten...")
- 06:31, 7 October 2022 Saurabh talk contribs created page Rocky 9.x Owncloud (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > File Sharing > Owncloud *Rocky 9.x Owncloud Manually moving DataDirectory *Rocky 9.x Owncloud delete files via REST API via command line *Rocky 9.x Owncloud upgrade by migrating to a new VM with updated version '''There are older articles at:''' *CentOS 8.x Owncloud *CentOS 7.x owncloud Home > Rocky Linux or Cen...")
- 06:30, 7 October 2022 Saurabh talk contribs created page Rocky 9.x File sharing (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > File Sharing *Rocky 9.x Owncloud Home > Rocky Linux or CentOS > Rocky Linux 9.x > File Sharing")
- 06:20, 7 October 2022 Saurabh talk contribs created page Rocky 9.x Web servers (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Web servers *Rocky 9.x Apache web server configuration Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Web servers")
- 06:13, 7 October 2022 Saurabh talk contribs created page Ls command (Created page with "Home > Shell scripting > ls command =Get full time along with year information in ls -l output= Normally '<tt>ls -l</tt>' output only prints date (day) and month and not year information of file last modification, access or change time. If the file is modified today itself it prints hour:minute information. To list year, seconds, Microseconds also use: <pre> ls -l --full-time </pre> Refer: * https://stackoverflow.com/questions/13999300/bash-ls-...")
- 10:02, 5 October 2022 Saurabh talk contribs created page Rocky 9.x Installing lets-encrypt SSL certificate (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Apache web server configuration > Rocky 9.x Installing lets-encrypt SSL certificate To install lets-encrypt certificate on a machine for use with apache (httpd) use: # dnf -y install epel-release mod_ssl # dnf -y install certbot python3-certbot-apache # certbot apache mode works only when NameVirtualHost is enabled and appropriate VirtualHost are created in apache. If this is not p...")
- 09:56, 5 October 2022 Saurabh talk contribs created page Rocky 9.x Apache web server configuration (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Apache web server configuration *Rocky 9.x Installing lets-encrypt SSL certificate '''There are older articles at: * CentOS 8.x apache web server''' * Apache web server configuration Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Apache web server configuration")
- 09:52, 5 October 2022 Saurabh talk contribs created page Rocky Linux 9.x (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x *Apache web server configuration")
- 09:51, 5 October 2022 Saurabh talk contribs moved page CentOS to Rocky Linux or CentOS
- 09:42, 5 October 2022 Saurabh talk contribs created page Disable root password expiry on vCenter (Created page with "Home > VMWare platform > VMWare vCenter > Disable root password expiry on vCenter To disable password expiry on vCenter '''Very important for VxRail / vCF automated environments''' use: # Login into vCenter via SSH and get access to bash shell by typing 'shell' in appliancesh prompt. #: OR we can open vCenter VM console via vCenter / ESXi host and login with root username and password # Change existing password (if required) via: #:<pre> #:: pa...")
- 09:38, 5 October 2022 Saurabh talk contribs created page Disable password expiry on SDDC Manager (Created page with "Home > VMWare platform > vCloud Foundation > Disable password expiry on SDDC Manager We should disable both root and vcf user password expiry on SDDC Manager via: # Either SSH to SDDC manager and login as vcf user. Then use 'su -' and enter root password to get root shell #: OR open remote console for SDDC manager VM via vCenter. Login with root user and root password # If vCenter root or SDDC manager root or SDDC manager vc...")
- 12:12, 25 September 2022 Saurabh talk contribs created page Delete Recovery partition in Windows 10 (Created page with "Home > Windows > Windows 10 > Delete Recovery partition in Windows 10 It is possible to have a recovery partition created after C: drive in Windows 10 after OS installation. This makes it difficult to increase the hard-disk size (esp. in case of VMs / storages) and expand C drive. If the recovery partition is not required then in such cases it can be deleted via: # If there are backup options (eg snapshot, etc.) perhaps take a proper backup...")
- 11:51, 25 September 2022 Saurabh talk contribs created page Disable cortana and use normal windows search using registry editing (Created page with "Home > Windows > Windows Server 2019 > Disable cortana and use normal windows search using registry editing To optimize on resources when Cortana is not desired (eg RDSH server with Horizon where OS Optimization TOol is not used), we can disable it via registry using: # Open regedit # Go to "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Windows Search" # If you don’t see a "Windows Search" key (folder) under the Windows folder, right...")
- 07:50, 25 September 2022 Saurabh talk contribs created page Multiple conhost.exe using high overall CPU esp. in VDI RDSH environment (Created page with "Home > Windows > Windows Server 2019 > Multiple conhost.exe using high overall CPU esp. in VDI RDSH environment In case of a VDI RDSH environment observed multiple conhost.exe processes with high CPU. Tried to use: <pre> sfc /scannow </pre> in administrator CMD. This did not solve the problem. Using sysinternal process explorer ( https://learn.microsoft.com/en-us/sysinternals/downloads/process-explorer ) also did not reveal more insight. D...")
- 03:16, 21 September 2022 Saurabh talk contribs created page Configure NSX-T north-south gateway firewall rules or policies (Created page with "Home > VMWare platform > VMWare NSX > Configure NSX-T north-south gateway firewall rules or policies When we configure NSX-T T0 in active-active mode as advised at Configure NSX-T 3.0 from scratch with edge cluster and tier gateways or as is automatically done when using VCloud Foundation automated NSX-T deployment, then while configuring north-south gateway firewall rules or policies we need to: * Ensure that TCP strict is disabled as...")
- 11:12, 12 September 2022 Saurabh talk contribs created page Add power servers to vHMC (Created page with "Home > VIOS or AIX > Add power servers to vHMC To add power servers to a new HMC use: # Login into HMC web interface as hscroot user # Go to all Systems # Choose option for "Add Managed Systems" # Add the IP address of HMC (not VIOS) of the power server to be added # Enter hmc admin password for authentication. (Default password is admin). # On confirm Add systems popup click "Add" # There might be prompt to set ASM General password. We can leave...")
- 09:19, 12 September 2022 Saurabh talk contribs created page Deploy vHMC virtual appliance and go through Install Wizard (Created page with "Home > VIOS or AIX > Deploy vHMC virtual appliance and go through Install Wizard vHMC can be deployed on top of VMWare (ESXi) or KVM hypervisors. To deploy it on vSphere use following steps: # Choose option to deploy OVA/OVF file from vSphere web client # Give appropriate VM name as per requirement and choose downloaded ova file from local disk to deploy vHMC # Choose appropriate Datastore, Network, Thin/Thick disk, etc. to deploy the VM # After o...")
- 05:48, 12 September 2022 Saurabh talk contribs created page Enabling photo viewer in Windows Server 2019 (Created page with "Home > Windows > Windows Server 2019 > Enabling photo viewer in Windows Server 2019 Home > VMWare platform > VMWare Horizon > Enabling photo viewer in Windows Server 2019 In case of Server 2019 machine being used as Desktop (eg RDSH VDI scenario), it might be useful to change default photo application from paint to photo viewer using: # Go to '<tt>C:\Program Files (x86)\Windows Photo Viewer</tt>' and look for DLLs rel...")
- 03:20, 12 September 2022 Saurabh talk contribs created page Configure NSX-T exclusion list (Created page with "Home > VMWare platform > VMWare NSX > Configure NSX-T exclusion list Sometimes it is desired to exclude a few VMs such as NSX controller cluster / NSX manager cluster, vCenter, AD etc. from NSX so that even if we make a mistake in writing an NSX distributed firewall policy, we can at least login into vCenter / NSX manager etc. and revert the changes. To configure a group (list) of VMs that should be excluded from NSX policies use: # Login int...")
- 06:33, 30 August 2022 Saurabh talk contribs created page Upgrading 12SP4 LPAR to 15SP1 (Created page with "Home > VIOS or AIX > Upgrading 12SP4 LPAR to 15SP1 To upgrade 12SP4 LPAR to 15SP1 use: # Connect two virtual optical drivers (one for installer and one for packages). See Add Virtual Optical Media to LPAR with desired OS ISO image # Start "Upgrade" option after booting through CD using "System management services". See Activating the LPAR (Starting) #* Press up/down arrow to get grub # Ideally we should have taken a backup of system (root...")
- 06:29, 30 August 2022 Saurabh talk contribs created page Backup of LPAR by booting into Suse installer DVD rescue mode (Created page with "Home > VIOS or AIX > Backup of LPAR by booting into Suse installer DVD rescue mode To take disk level image backup of LPAR to a remote location use: # We should have a backup destination with dd, nc installed. It can be a Linux machine (Physical or VM) or in case of Windows install Cygwin with ddrescue and nc also selected along with default packages. # Boot the LPAR via "System Management Service" so that we can go to rescue mode of CD. (Suse12S...")
- 06:26, 30 August 2022 Saurabh talk contribs created page Installing Suse 12SP4 in LPAR (Created page with "Home > VIOS or AIX > Installing Suse 12SP4 in LPAR After Activating the LPAR (Starting) to boot via Suse 12SP4 installed DVD (See Uploading a new OS ISO to VIOS Library and Add Virtual Optical Media to LPAR with desired OS ISO image), we can install OS using: # After existing "System Management Service" via grub choose option of "Installation". #* You may have to press up-down arrow to get grub menu #* Careful avoid left-right arrow....")
- 06:24, 30 August 2022 Saurabh talk contribs created page Activating the LPAR (Starting) (Created page with "Home > VIOS or AIX > Activating the LPAR (Starting) After Create LPAR and Add Virtual Optical Media to LPAR with desired OS ISO image we can activating the created LPAR and boot it using attached virtual optical media using: # Login into vHMC # Go to Power server # Select the LPAR. From Actions menu choose "Activate" # To boot via virtual optical CD/DVD in "Activation Options" expand "Advanced Settings" against "Boot Mode" select "System M...")
- 06:20, 30 August 2022 Saurabh talk contribs created page Add Virtual Optical Media to LPAR with desired OS ISO image (Created page with "Home > VIOS or AIX > Add Virtual Optical Media to LPAR with desired OS ISO image To add a virtual CD/DVD (Optical Media) to LPAR using ISO image uploaded to library (See Uploading a new OS ISO to VIOS Library ) use: # Login into vHMC # Go to LPAR created in above steps # Go to "Virtual Storage" # Go to "Virtual Optical Device" # Click on "Add Virtual Optical Device" # Give approprite Device Name (eg cd1), Select the VIOS Server, click ok. # Se...")
- 05:04, 30 August 2022 Saurabh talk contribs created page Uploading a new OS ISO to VIOS Library (Created page with "Home > VIOS or AIX > Uploading a new OS ISO to VIOS Library To upload a new OS ISO to VIOS Library (and optionally create a new library as required): # Download relevant ISO using Internet # Use "WinSCP" with scp (*and not sftp*0 to login into VIOS as padmin or root # Copy the ISO to /home/padmin (padmin) or /tmp (root). #: If copied to /home/padmim, login into putty as padmin. Use "r o". Move uploaded ISO to /tmp. # Login into vHMC # Go to Pow...")
- 05:02, 30 August 2022 Saurabh talk contribs created page Adding Root disk / storage to LPAR (Created page with "Home > VIOS or AIX > Adding Root disk / storage to LPAR To add root disk or additional storage to LPAR via vHMC: # Go to LPAR created as per Create LPAR # Go to "Virtual Storage" # In case of virtual FC storage (NPIV) ## Using "Virtual Fibre Channel" tab ##* Add virtual Fiber channel devices to the LPAR ##* Select all Fibre Channel Ports (2/4) and click ok. ##: You can see availabile port connections count (eg 61) on this screen. ## Do zoning,...")
- 05:00, 30 August 2022 Saurabh talk contribs created page Adding Virtual Network to LPAR (Created page with "Home > VIOS or AIX > Adding Virtual Network to LPAR To add Virtual network (NIC) to LPAR via vHMC use: # Go to LPAR created as per Create LPAR # Go to "Virtual Networks" # Click "Attach Virtual Network" # Select appropriate virtual network name based on site. Ideally this network should be connected to a "Virtual Network Bridge" # Click ok. Home > VIOS or AIX > Adding Virtual Network to LPAR")
- 04:59, 30 August 2022 Saurabh talk contribs created page Create LPAR (Created page with "Home > VIOS or AIX > Create LPAR To create LPAR using vHMC use: # Login into vHMC # Go to Power Server # Click on "Create Partition" on top right corner # Give appropriate Partition Name. ## Leave Partition ID to <auto assign>, Partition Type to AIX/Linux, Maximum Virtual Adapters:10 # Click on "Processor conifguration" with Processor Mode "Shared", Uncapped ## For test LPAR leave virtual processors minimum, allocated and maximum to 1 ## Processi...")
- 04:52, 30 August 2022 Saurabh talk contribs created page Using vi editing mode on shell (Created page with "Home > VIOS or AIX > Using vi editing mode on shell We can use following to enable vi editing mode on shell: <pre> set -o vi </pre> After this we can do the following at least: ;Esc + v : Escape takes to control mode and then v is for editing the line in vi. After editing we can use :wq to execute the typed command 'Esc + k : Escape takes to control mode and then k takes to previous command in history. More on this at https://www.ibm.com/docs/...")
- 15:12, 24 August 2022 Saurabh talk contribs moved page Nessuss to Nessus (Corrected name)
- 07:52, 17 August 2022 Saurabh talk contribs created page Disable hot plug and unplug for NIC and USB for clients (Created page with "Home > VMWare platform > VMWare Horizon > Disable hot plug and unplug for NIC and USB for clients When users connect to Horizon VDI via Horizon client, they get option to unplug both USB and NIC. USB unplug is useful to safely remove USB device, but NIC unplug disconnections the VM. After that we need to remove the old NIC from the VM at vSphere/vCenter level and reconfigure the VM with same IP on a new NIC. To avoid all this we can disable...")
- 07:44, 17 August 2022 Saurabh talk contribs created page Configure RDSH licensing server and client for VDI (Created page with "Home > VMWare platform > VMWare Horizon > Configure RDSH licensing server and client for VDI By default the Windows Server 2019 VMs might allow RDSH via VDI RDSH pools to work only till 180 days. For any extended usage perhaps license is required. To setup a RDSH licensing server and client use below steps: =Get Microsoft licensing ID for the organization= The next sections explain server setup using "Agreement No". To find Agreement No fo...")
- 07:08, 17 August 2022 Saurabh talk contribs created page CentOS 8.x Roundcube web based installer for Gmail IMAP and SMTP (Created page with "Home > CentOS > CentOS 8.x > Web based tools > CentOS 8.x Roundcube > CentOS 8.x Roundcube web based installer for Gmail IMAP and SMTP After installation as per CentOS 8.x Roundcube installation visit http://<server-fqdn-or-ip>/installer to proceed further as follows: # Check environment -- click NEXT button in the bottom of page # Create Config ## In database setup section, fill Database password as co...")