Ubuntu

Ubuntu (/ʊˈbuːntʊ/ uu-boon-tuu, stylized as ubuntu)[11] is a Debian-based Linux operating system for personal computers, tablets and smartphones, where Ubuntu Touch edition is used; and also runs network servers, usually with the Ubuntu Server edition, either on physical or virtual servers (such as on mainframes) and/or with containers, that is with enterprise-class features; runs on the most popular architectures, including server-class ARM-based.
Ubuntu is published by Canonical Ltd, who offer commercial support.[12] It is based on free software and named after the Southern African philosophy of ubuntu (literally, 'human-ness'), which Canonical Ltd. suggests can be loosely translated as "humanity to others" or "I am what I am because of who we all are".[13] It uses Unity as its default user interface for the desktop.
Ubuntu is the most popular operating system running in hosted environments, so–called "clouds",[14] as it is the most popular server Linux distribution.
Development of Ubuntu is led by UK-based Canonical Ltd., a company of South African entrepreneur Mark Shuttleworth. Canonical generates revenue through the sale of technical support and other services related to Ubuntu.[15][16] The Ubuntu project is publicly committed to the principles of open-source software development; people are encouraged to use free software, study how it works, improve upon it, and distribute it.[17][18]

for more details you can see on : https://en.wikipedia.org/wiki/Ubuntu_(operating_system)