Official Ubuntu Documentation

This site is where you can find the official documentation developed and maintained by the Ubuntu Documentation Project.
Choose your version of Ubuntu below to access the documentation for that version (find out which version of Ubuntu you are running).
If you don't find what you are looking for, visit the community contributed documentation for even more material!

• Ubuntu 12.04 LTS - the current long term support version, released in April 2012, codenamed Precise Pangolin.

  Documentation for Ubuntu 12.04 LTS

  This site is where you can find the official documentation developed and maintained by the Ubuntu Documentation Project.
  This page contains documentation for Ubuntu 12.04 LTS, the latest stable version, released in April 2012.
  
  • Ubuntu Desktop Help
    
  • Ubuntu Server Guide (PDF version)
    
  • Installing Ubuntu
    
  If you can't find what you are looking for here, try the excellent source of community contributed documentation.
  
  
• Ubuntu 11.10 - the current stable version, released in October 2011, codenamed Oneiric Ocelot.

  Documentation for Ubuntu 11.10

  This site is where you can find the official documentation developed and maintained by the Ubuntu Documentation Project.
  This page contains documentation for Ubuntu 11.10, the latest stable version, released in October 2011. If you can't find what you are looking for here, try the excellent source of community contributed documentation.
  
  • Ubuntu Desktop Help
    
  • Ubuntu Server Guide (PDF version)
    
  • Installing Ubuntu
    
• Ubuntu 11.04 - a previous stable version, released in April 2011, codenamed Natty Narwhal.
  

  Documentation for Ubuntu 11.04

  This site is where you can find the official documentation developed and maintained by the Ubuntu Documentation Project.
  This page contains documentation for Ubuntu 11.04, a stable version, released in April 2011. If you can't find what you are looking for here, try the excellent source of community contributed documentation.
  
  • Ubuntu Desktop Help
    
  • Ubuntu Server Guide (PDF version)
    
  • Installing Ubuntu
    
• Ubuntu 10.04 LTS - a previous long term support version, released in April 2010, codenamed Lucid Lynx.
  
• Ubuntu 8.04 LTS - a previous long term support version, released in April 2008, codenamed Hardy Heron.
  

If your version of Ubuntu is not listed above, it is no longer supported and does not receive security or critical fixes. Documentation for these releases of Ubuntu is no longer supplied, but information on how to upgrade to supported versions of Ubuntu can be found at the Upgrade Notes page.