Linux Ubuntu is named after the Southern African philosophy of Ubuntu ("humanity towards others").
Ubuntu is designed primarily for desktop use. Ubuntu is sponsored by the UK-based company Canonical.

Canonical releases new versions of Ubuntu every six months with commitment to support each release
for eighteen months. It was decided that every fourth release, would receive long-term support (LTS).
LTS releases are supported for three years on the desktop and five years on the server.

If you are wondering what to do after install linux ubuntu. Follow these steps. Tunning up your ubuntu

                                  Server       Desktop

Processor                      300 MHz    1 GHz

Memory                        128 MB      512 MB

Hard Drive (free space)   1 GB        5 GB

Version Code name Release date

9.10    Karmic Koala 2009-10-29

10.04 LTS    Lucid Lynx 2010-04-29

10.10    Maverick Meerkat 2010-10-10
11.04           Natty Narwhal           2011-04-28