Ubuntu ( / ʊ ˈ b ʊ n t uː / ( ) ) is a free and open- source Linux distribution based on Debian. Ubuntu is officially released in three editions: Desktop, Server, and Core ( for IoT devices and robots). Ubuntu is a popular operating system for cloud computing, with support for OpenStack.
Ubuntu is released every six months, with long- term support releases every two years. The project announced the development schedule in November and Lubuntu 11. 04 was released on time on 28 April.