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Ubuntu (/ ʊ ˈ b ʊ n t uː / ⓘ uu-BUUN-too) [8] is a Linux distribution derived from Debian and composed mostly of free and open-source software. [9] [10] [11] Ubuntu is officially released in multiple editions: Desktop, [12] Server, [13] and Core [14] for Internet of things devices [15] and robots.
Ubuntu releases are also given code names, using an adjective and an animal with the same first letter – an alliteration, e.g., "Dapper Drake".With the exception of the first two releases, code names are in alphabetical order, and except for the first three releases, the first letters are sequential, allowing a quick determination of which release is newer.
A boot menu in Windows 7 showing options to start Ubuntu, which was added by the Wubi installer. Wubi adds an entry to the Windows boot menu which allows the user to run Linux. Ubuntu is installed within a file in the Windows file system (c:\ubuntu\disks\root.disk), as opposed to being installed within its own partition.
It is possible to install Linux onto most of these file systems. The ext file systems, namely ext2, ext3, and ext4 are based on the original Linux file system. File systems have been developed by companies to meet their specific needs, by hobbyists, or adapted from Unix , Microsoft Windows, and other operating systems.
A group of Standards Committees from the IEEE, the Open Group and the ISO/IEC began working on the Single UNIX Specification v 3; they together became known as the Austin Group. A Technical Standard for Shell and Utilities was created in The Open Group Base Specifications, Issue 6, which is itself a part of the Single UNIX Specification v 3. [ 43 ]