Checking the operating system (OS) version on a Linux system is crucial for various reasons, including software compatibility, security updates, and troubleshooting. There are several commands you can use to determine the OS version, depending on the Linux distribution you are using.
One of the most common commands is `cat /etc/os-release`. This command will print the contents of the `/etc/os-release` file, which contains information about the OS, including the name, version, and build number. For example, on a Ubuntu 20.04 system, the output of this command would be: