Linux Basics: How do I know what Linux kernel I’m running?

If all you want to know is which version of the Linux kernel you’re currently running there is a very simple command line tool you can use. Just open the terminal and run this command:

uname -r

This will print out something like the following:

4.15.0-64-generic

If you want to see even more information you can pass -a to uname which will show all of the information.

uname -a