About

Free, open-source operating system based on Debian GNU/Linux. Ubuntu questions are on topic here, but if you prefer an Ubuntu-only audience there is AskUbuntu.com.

Ubuntu is a computer operating system originally based on the Debian GNU/Linux distribution and distributed as free and open source software.

The related Stack Exchange site, Ask Ubuntu, exists if you would prefer an Ubuntu-only audience, as opposed to the multi-environment/operating system one found here on Super User.

Development Version

The development version of Ubuntu is not recommended for beginners because it often contains major bugs and incomplete functionality. The release currently in development is (Xenial Xerus). Alpha, Beta, and Release Candidates of each development version are released for testing purposes starting about two months (one-third) of the way into the development cycle, as defined by the Release Schedule.

The release schedule of the current development version, Xenial Xerus, can be found here.

Support

At any given time, two or three Long Term Support (LTS) versions are supported as well as the most recent prior non-LTS version. If the latest stable release is non-LTS, then two non-LTS releases are supported: the current and the prior one. If the latest stable release is an LTS, then only the prior non-LTS release and the LTS releases are supported.

Support means that security and bug fix updates are continuing to be released to the update repositories. When support is dropped for an old release, responsibility for fixing any bugs or security issues is left up to the user.

The released, currently supported versions are:

Derivatives

The eight officially-recognized derivatives of Ubuntu are , , , Edubuntu, Mythbuntu, Ubuntu GNOME, , and Ubuntu Studio.

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