How can I check which Linux version is installed on a machine?

Question

Inherited an old box at work and need to know the distro and release before installing anything. uname -r only gives me the kernel number. Is there a command that shows the actual distro name and version?

otisk · Answer

cat /etc/os-release works on pretty much every distro. hostnamectl also shows it, and uname -r gives you the kernel version if that's what you're after.

How can I check which Linux version is installed on a machine?

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