Which version of Ubuntu am I running
To find out which version Ubuntu is installed simply type the following in to a console:
lsb_release -a
The answer will look something like this:
No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 12.04.2 LTS Release: 12.04 Codename: precise
Another option that can be run on any version of Linux is to type:
cat /etc/*rel*