Linux is an open-source and free OS that has many variants referred to as Linux distributions. You could check the OS version in Linux in simple 4 steps mentioned below:
Open a Linux terminal most commonly is Bash Shell.
Then type any of these three command-lines in it to determine the OS name and version in Linux:
And you could determine the OS version and name from the output of the command.
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On this note, I would suggest you watch the Linux Commands Tutorial for Beginners video from our experts to help you get started.