The first LTS releases were supported for three years on the desktop and five years on the server; since Ubuntu 12.04 LTS, desktop support for LTS releases was increased to five years as well.
) На другие дистрибутивы LTS семейства ubuntu действует полная поддержка в 3 года, а для основы системы (ядро, Xorg и прочие компоненты) — 5 лет.