Let’s say, you want to find find Linux version you are using/running then you can use the following command.

lsb_release -a
After executing the above command you will see the output something like this:
No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04.2 LTS Release: 18.04 Codename: bionic
Now, we can see the which version of the Linux distro we are using.