Rocky 9.x Generating ISO from Directories and Subdirectories

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How to Create an ISO File from a Directory

Step 1: Install genisoimage (if not installed)

On Ubuntu/Debian

sudo apt update
sudo apt install genisoimage

On RHEL/CentOS/Rocky Linux

sudo yum install genisoimage

Step 2: Prepare Directories (Including Subdirectories) You Want to Convert to ISO

mkdir iso_source_data
cp -r /path/to/your/files/* /iso_source_data

Step 3: Convert Directory into ISO File

genisoimage -o Output.iso -V LABEL -r -J /full/path/to/iso_source_data

Options Explained:

  • -o Output.iso : Specifies the output ISO file name
  • -V LABEL : Sets the volume label of the ISO
  • -r : Keeps Rock Ridge extensions for Unix compatibility (safe to include even if you're primarily using it on Windows)
  • -J : Enables Joliet extensions for Windows compatibility, allowing long filenames and Unicode
  • iso_source_data : Directory which we want to convert to ISO format

Step 4: Check What's Inside the ISO

Option 1: List Files in the ISO (No Mounting Needed)

isoinfo -i Output.iso -l

Option 2: Mount the ISO to Look Inside

mkdir /mnt/iso
sudo mount -o loop Output.iso /mnt/iso
ls /mnt/iso

Step 5: Now Move or Use the ISO File

  • Burn it to a CD/DVD using tools like Brasero, K3b, or cdrecord
  • Use it in a virtual machine (e.g., VirtualBox, VMware, Proxmox)
  • Upload it to cloud services for deployment or storage

Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > File system management > Rocky 9.x Generating ISO from Directories and Subdirectories

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