Ubuntu 10.04 (Lucid Lynx), is the twelfth release of Ubuntu from Canonical.

Ubuntu 10.04 (Lucid Lynx) was released on 29 April 2010 and is a LTS (Long Term Support) release of Ubuntu. This means that unlike normal releases, it will be supported until 2013 on the desktop and 2015 on the server, in contrast to the 18-month support period of non-LTS releases.