May 31, 2018

Check the version of Ubuntu I am running

lsb_release -a
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04 LTS
Release: 18.04
Codename: bionic

Your version appears on the "Description" line.
If you want to check it through your desktop environment, you can check System Settings -> Details.