CentOS 8.x iproute2 basics

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Home > CentOS > CentOS 8.x > System Administration > Network configuration > CentOS 8.x iproute2 basics

See network connection information

To see list of network connections use:

ss -anp

where options mean

-a
All listening + established port details
-n
Do not resolve service names, hostnames, etc.
-p
Show owning process ID

For further filtering you can consider using:

-t
Show only tcp sockets
-u
Show only udp sockets
-x
Show only unix sockets
-4
Show only IPv4 information
-6
Show only IPv6 information
-l
Show only listening sockets


See no. of established connections per IP

To see no. of established connections per IP use:

ss -at | grep ESTAB | awk '{print $5}' | cut -d":" -f1 | sort | uniq -c | sort -n




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