Ubuntu Version

A simple way to check the Ubuntu version is to look at /etc/lsb-release file. Run the following command from a terminal windows:

$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=7.04
DISTRIB_CODENAME=feisty
DISTRIB_DESCRIPTION="Ubuntu 7.04"

This is true also for other Linux distribution which follow LSB standard, look at About.com for more information.

Danilo