Ubuntu version history - Wikipedia
https://en.wikipedia.org/wiki/Ubuntu_version_history
OverviewVersion end-of-lifeNaming conventionRelease historySee alsoExternal linksUbuntu releases are made semiannually by Canonical Ltd, its developers, 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 planned, the version n…
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