How to check your Ubuntu version

It seems I'm always forgetting some basic Linux commands - probably because I don't run them very often.

To check which version of Ubuntu you're running simply type lsb_release -a.

kfm@atlas:/$ lsb_release -a  
No LSB modules are available.  
Distributor ID:    Ubuntu  
Description:    Ubuntu 16.10  
Release:    16.10  
Codename:    yakkety