How to Check the Version in Linux: OS, Kernel, and Software

Knowing exactly what version of Linux you're running — whether that's the distribution, the kernel, or a specific application — is one of the most practical skills you can develop as a Linux user. It affects everything from troubleshooting errors to installing compatible software packages.

Here's a clear breakdown of how version checking works in Linux, what each method tells you, and why the results vary depending on your setup.

Why Linux Versioning Has Multiple Layers

Unlike Windows or macOS, Linux isn't a single operating system — it's a combination of components. That means version checking isn't a single command. You'll typically want to know:

• The distribution version (e.g., Ubuntu 22.04, Fedora 38, Debian 12)
• The kernel version (the core that manages hardware)
• The version of specific software (e.g., Python, Git, Apache)

Each has its own command and serves a different purpose.

How to Check Your Linux Distribution Version

Your distribution (distro) is what most people mean when they say "Linux version." There are several reliable ways to find it.

Using /etc/os-release

This is the most universally compatible method across modern Linux distros: