Ubuntu is a Debian-based Linux operating system, with Unity as its default desktop environment(GNOME was the previous desktop environment). It is based on free software and named after the Southern African philosophy of ubuntu (literally, "human-ness"), which often is translated as "humanity towards others" or "the belief in a universal bond of sharing that connects all humanity
Ubuntu is one of the Most Popular Linux Free Available Operating System.
Ubuntu on 25th March 2014 Release his New Version Ubuntu 14.04 Final Beta
Download IT FROM HERE : LINK