Ubuntu releases ( Ubuntu 13.04 download ) are made semiannually by Canonical Ltd, the developers of the Ubuntu operating system, using the year and month of the release as a version number. The first Ubuntu release, for example, was Ubuntu 4.10 and was released on 20 October 2004.Consequently, version numbers for future versions are provisional; if the release is delayed until a different month (or even year) to that...
