What terminal command checks the Ubuntu version
For the description and the release number including the OS name, run:
$ lsb_release -d
Description: Ubuntu 12.04 LTS
Just for the the codename, use:
$ lsb_release -c
Codebase: precise
For the release number only, use:
$ lsb_release -r
Release: 12.04
For all lsb version details, use:
$ lsb_release -a
Distributor ID: Ubuntu
Description: Ubuntu 12.04 LTS
Release: 12.04
Codename: precise
This should give you what you want:
cat /etc/lsb-release