Hi, this artical is speacially for all Linux Lover. I will teach you that how you can install Ubuntu 12.04 (or other versions of linux distros) in Oracle Virtual box. This is a quite usefull and intresting thing. You can easily install two opreating systems simultaniously.

First of all download ISO image file of Ubuntu from : http://www.ubuntu.com/download/desktop
Then intall Oracle Virtual Box from : https://www.virtualbox.org/wiki/Downloads