How to Check the Linux Kernel and Distribution Version? (uname & lsb_release)

Use uname -r to view the Linux kernel version, lsb_release -a or cat /etc/os-release to view release information; the former only displays the kernel, and the latter provides detailed information such as release ID, version number, and codename.

To quickly find out your Linux kernel and distribution version, use uname for the kernel and lsb_release for the distro — both are standard, reliable, and available on most systems.

Check the Linux kernel version with uname

The uname command shows kernel-level information. For just the version number:

• uname -r — returns only the kernel release (eg, 6.5.0-41-generic )
• uname -v — shows the kernel build version string
• uname -a — gives full system info including kernel name, version, machine type, and OS

Note: uname tells you *nothing* about your distribution — it only reports kernel details, regardless of whether you're on Ubuntu, CentOS, or Arch.

Check the Linux distribution version with lsb_release

lsb_release is designed specifically for distro identification. It reads LSB (Linux Standard Base) metadata, usually accurate on Debian-, Ubuntu-, and RHEL-based systems:

• lsb_release -a — shows all distro info: distributor ID, description, release number, and codename
• lsb_release -d — prints just the description (eg, Description: Ubuntu 24.04.1 LTS )
• lsb_release -cs — outputs the codename (eg, noble ) — useful for APT sources

If lsb_release isn't installed (common on minimal or non-LSB distros like Alpine or Arch), try reading /etc/os-release instead: cat /etc/os-release .

When lsb_release isn't available or unreliable

Some distributions don't ship LSB tools by default, or their /etc/os-release may be more trustworthy than lsb_release . Key fallbacks:

• cat /etc/os-release — modern, universal, and well-maintained across systemd distros
• cat /etc/issue — shows login banner text; often includes distro name and version (but can be edited)
• hostnamectl — on systemd systems, displays OS, kernel, and hostname in one view

For rolling-release distros like Arch or Gentoo, kernel version matters more than a “distribution version” — so uname -r pacman -Q linux (Arch) or emerge --info (Gentoo) give better context.

Basically just two commands get you 90% of the way: uname -r for the kernel, lsb_release -a (or /etc/os-release ) for the distro — simple, fast, and widely supported.

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