Ubuntu

Ubuntu (originally /ʊˈbuːntʊ/ uu-boon-tuu, according to the company website /ʊˈbʊntuː/ uu-buun-too)[10][11][12][13][14] is a Debian-based LinuxOS operating system and distribution, with Unity as its default desktop environment for personal computers including smartphones in later versions. Ubuntu also runs network servers. https://en.wikipedia.org/wiki/Ubuntu_(operating_system)