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Ubuntu Unleashed 2014 Edition: Covering 13.10 and 14.04,Ninth Edition by Paul Hudson, Andrew Hudson, Matthew Helmke

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Foundations and the X Server

Ubuntu uses the X Window System, the graphical networking interface found on many Linux distributions that provides the foundation for a wide range of graphical tools and window managers. More commonly known as just X, it can also be referred to as X11R7 and X11 (as found on Mac OS X). Coming from the world-renowned Massachusetts Institute of Technology, X has gone through several versions, each of which has extended and enhanced the technology. The open-source implementation is managed by the X.Org foundation, whose board includes several key figures from the open-source world. On September 15, 2012, X11 turned 25 years old, which is a very long time for any software to remain usable and be in active development. ...

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