Ubuntu is a computer operating system based on the Debian GNU/Linux distribution and distributed as free and open source software. It is named after the Southern African philosophy of Ubuntu (“humanity towards others”). Ubuntu is designed primarily for desktop use, although netbook and server editions exist as well. Web statistics suggest that Ubuntu’s share of Linux desktop usage is about 50%, and indicate upward-trending usage as a web server. Ubuntu holds an estimated global usage of more than 12 million users, and it is considered by DistroWatch to be the most popular distribution of Linux.(The second-most popular distribution, Linux Mint, is itself a derivative of Ubuntu.)
Ubuntu is sponsored by the UK-based company Canonical Ltd., owned by South African entrepreneur Mark Shuttleworth. Canonical generates revenue by selling technical support and services tied to Ubuntu, while the operating system itself is entirely free of charge.
Ubuntu 11.04 (Natty Narwhal)
The naming of Ubuntu 11.04 was announced on 17 August 2010 by Mark Shuttleworth. Ubuntu 11.04 Natty Narwhal was released 28 April 2011.Ubuntu Desktop uses the Unity user interface instead of GNOME Shell as default. The move to Unity is controversial as some GNOME developers fear it will fracture the community and marginalize GNOME Shell. Ubuntu 11.04 uses Banshee as the default music player, replacing Rhythmbox. Other new applications include Mozilla Firefox 4 and LibreOffice, which has replaced OpenOffice.org. Starting with Ubuntu 11.04 the Ubuntu Netbook Edition has been merged into the desktop edition.