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Logo of Plan 9 from People's Front of Cat-v.org
Written in Dialect of ANSI C
Working state Current
Source model Free and open source software
Initial release June 17, 2011; 3 years ago (2011-06-17)[1]
Available in English
Update method Mercurial
Supported platforms x86 / Vx32, ARM[citation needed]
Kernel type Monolithic
Default user interface rio / rc
License Lucent Public License
Official website code.google.com/p/plan9front/

9front is a fork of the Plan 9 from Bell Labs operating system. The project was started to remedy a perceived lack of devoted development resources inside Bell Labs,[citation needed] and has accumulated various fixes and improvements.


Main article: Plan 9 from Bell Labs

9front retains features of Plan 9 from Bell Labs and continues to integrate changes from the original source tree while adding new drivers, features and bugfixes.[2] As with stock Plan 9, 9front is a free software distributed operating system that achieves resource generalization by using the 9P protocol to present a consistent interface for accessing local and remote resources as files. It also features private namespaces,[3] union mounts, proc file system, and native unicode support throughout the system.


Work on the fork began in March 2011.[4] The project was announced under the name "Plan 9 from The People's Front of Cat-v.org",[1] though subsequently it was referred to by the name "9front".[5]


The project is hosted on Google Code;[5][6] unlike Bell Labs' distribution, 9front uses Mercurial for source code revision control.[7]


  1. ^ a b "Plan 9 from the People's Front of cat-v.org (9front)", NineTimes, June 17, 2011, retrieved September 13, 2012 .
  2. ^ New Features, retrieved May 14, 2013 .
  3. ^ Pike, Rob, The Use of Name Spaces in Plan 9, retrieved April 8, 2013 .
  4. ^ 9front first commit, retrieved April 8, 2013 .
  5. ^ a b Robertson, James (July 16, 2011), "Plan 9 Forked, Continues as 9front", OSNews, retrieved September 13, 2012 .
  6. ^ ris (July 20, 2011), "9Front", LWN.net, retrieved September 21, 2012 
  7. ^ Grüner, Sebastian (July 18, 2011), "Fork des Betriebssystems Plan 9" [Fork of Plan 9 operating system], golem.de (in German), retrieved September 13, 2012 .

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