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[[File:Software-cd1.jpg|thumb|IRIX 4.0.5 CD]]
 
[[File:Software-cd1.jpg|thumb|IRIX 4.0.5 CD]]
General information about the SGI IRIX operating system.
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General information about the SGI IRIX operating system. The last IRIX release was in 2006 and support for the operating system ended in 2013.
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IRIX is a System V-based Unix computer operating system with BSD extensions developed by [[Silicon Graphics]] (SGI) to run natively on their 32- and 64-bit [[MIPS architecture]] workstations and servers.
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As a result of its Unix underpinnings, it is capable of extremely long uptimes and its [[XFS]] file system is regarded as one of the most advanced journaling file systems in the industry.
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IRIX has particularly strong support for 3D graphics, video, and high-bandwidth bulk data transfer. IRIX was one of the first Unix flavors to feature a graphical user interface for the main desktop environment and was widely used in the computer animation industry and for scientific visualization due to its extremely good performance with 3D graphics. IRIX uses the IRIX Interactive Desktop, which by default uses the [[IRIX 4Dwm|4Dwm]] window manager with a custom look designed using the Motif widget toolkit.
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The current major version of IRIX is IRIX 6.5 which was released in May 1998. New minor versions were released every quarter up through version 6.5.30. Until version 6.5.22 there were two branches of each release: a maintenance release that included only fixes to the original IRIX 6.5 code and a feature release that included improvements and enhancements. Historically, the maintenance releases were a free download while the feature stream required a support contract. Selected versions up through the 6.5.22 maintenance release are currently available for free download while version 6.5.23 and higher require an active [[Silicon Graphics]] support contract, despite only running on Silicon Graphics hardware.
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IRIX is compliant with UNIX System V Release 4, UNIX 95 and POSIX (including 1e/2c draft 15 ACLs and Capabilities).
    
== Version History ==
 
== Version History ==
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|IRIX (4D1) 3.0
 
|IRIX (4D1) 3.0
 
|1988
 
|1988
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|-
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|IRIX (4D1) 3.2
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|1989
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|-
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|IRIX (4D1) 3.3
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|Jun 1990
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|-
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|IRIX (4D1) 3.3.1
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|Sept 1990
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|-
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|IRIX (4D1) 3.3.2
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|Dec 1990
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|-
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|IRIX 4.0
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|Sept 1991
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|-
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|IRIX 4.0.1
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|Nov 1991
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|-
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|IRIX 4.0.2
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|Mar 1992
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|-
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|IRIX 4.0.3
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|Mar 1992
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|-
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|IRIX 4.0.4
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|Mar 1992
 
|-
 
|-
 
|IRIX 4.0.5
 
|IRIX 4.0.5
|1990
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|1992
 
|-
 
|-
 
|IRIX 5.0
 
|IRIX 5.0
|1993
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|Mar 1993
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|-
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|IRIX 5.0.1
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|Jun 1993
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|-
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|IRIX 5.1
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|Sept 1993
 
|-
 
|-
 
|IRIX 5.2
 
|IRIX 5.2
|1994
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|Mar 1994
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|-
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|IRIX 5.3
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|Nov 1994
 
|-
 
|-
 
|IRIX 6.0
 
|IRIX 6.0
 
|1994
 
|1994
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|-
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|IRIX 6.0.1
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|Dec 1994
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|-
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|IRIX 6.1
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|Jul 1995
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|-
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|IRIX 6.2
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|Mar 1996
 
|-
 
|-
 
|IRIX 6.3
 
|IRIX 6.3
|1996
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|Sept 1996
 
|-
 
|-
 
|IRIX 6.4
 
|IRIX 6.4
|1997
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|Nov 1996
 
|-
 
|-
 
|IRIX 6.5
 
|IRIX 6.5
 
|May 1998
 
|May 1998
 
|-
 
|-
|IRIX 6.5.1
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|[[IRIX 6.5.1]]
 
|Aug 1998
 
|Aug 1998
 
|-
 
|-
|IRIX 6.5.2
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|[[IRIX 6.5.2]]
 
|Nov 1998
 
|Nov 1998
 
|-
 
|-
|IRIX 6.5.3
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|[[IRIX 6.5.3]]
 
|Feb 1999
 
|Feb 1999
 
|-
 
|-
|IRIX 6.5.4
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|[[IRIX 6.5.4]]
 
|May 1999
 
|May 1999
 
|-
 
|-
|IRIX 6.5.5
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|[[IRIX 6.5.5]]
 
|Aug 1999
 
|Aug 1999
 
|-
 
|-
|IRIX 6.5.6
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|[[IRIX 6.5.6]]
 
|Nov 1999
 
|Nov 1999
 
|-
 
|-
|IRIX 6.5.7
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|[[IRIX 6.5.7]]
 
|Feb 2000
 
|Feb 2000
 
|-
 
|-
|IRIX 6.5.8
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|[[IRIX 6.5.8]]
 
|May 2000
 
|May 2000
 
|-
 
|-
|IRIX 6.5.9
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|[[IRIX 6.5.9]]
 
|Aug 2000
 
|Aug 2000
 
|-
 
|-
|IRIX 6.5.10
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|[[IRIX 6.5.10]]
 
|Nov 2000
 
|Nov 2000
 
|-
 
|-
|IRIX 6.5.11
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|[[IRIX 6.5.11]]
 
|Feb 2001
 
|Feb 2001
 
|-
 
|-
|IRIX 6.5.12
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|[[IRIX 6.5.12]]
 
|May 2001
 
|May 2001
 
|-
 
|-
|IRIX 6.5.13
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|[[IRIX 6.5.13]]
 
|Aug 2001
 
|Aug 2001
 
|-
 
|-
|IRIX 6.5.14
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|[[IRIX 6.5.14]]
 
|Nov 2001
 
|Nov 2001
 
|-
 
|-
|IRIX 6.5.15
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|[[IRIX 6.5.15]]
 
|Feb 2002
 
|Feb 2002
 
|-
 
|-
|IRIX 6.5.16
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|[[IRIX 6.5.16]]
 
|May 2002
 
|May 2002
 
|-
 
|-
|IRIX 6.5.17
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|[[IRIX 6.5.17]]
 
|Aug 2002
 
|Aug 2002
 
|-
 
|-
|IRIX 6.5.18
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|[[IRIX 6.5.18]]
 
|Nov 2002
 
|Nov 2002
 
|-
 
|-
|IRIX 6.5.19
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|[[IRIX 6.5.19]]
 
|Feb 2003
 
|Feb 2003
 
|-
 
|-
|IRIX 6.5.20
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|[[IRIX 6.5.20]]
 
|May 2003
 
|May 2003
 
|-
 
|-
|IRIX 6.5.21
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|[[IRIX 6.5.21]]
 
|Aug 2003
 
|Aug 2003
 
|-
 
|-
|IRIX 6.5.22
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|[[IRIX 6.5.22]]
 
|Nov 2003
 
|Nov 2003
 
|-
 
|-
|IRIX 6.5.23
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|[[IRIX 6.5.23]]
 
|Feb 2004
 
|Feb 2004
 
|-
 
|-
|IRIX 6.5.30
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|[[IRIX 6.5.24]]
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|May 2004
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|-
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|[[IRIX 6.5.25]]
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|Aug 2004
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|-
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|[[IRIX 6.5.26]]
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|Nov 2004
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|-
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|[[IRIX 6.5.27]]
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|Feb 2005
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|-
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|[[IRIX 6.5.28]]
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|Aug 2005
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|-
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|[[IRIX 6.5.29]]
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|Feb 2006
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|-
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|[[IRIX 6.5.30]]
 
|Aug 2006
 
|Aug 2006
 
|}
 
|}
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== Guides ==
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* [[Helpful commands in IRIX]]
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* [[IRIX Administrative Commands]]
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* [[IRIX Customizing the Desktop]]
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* [[IRIX Increase And Maintain Swap]]
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* [[IRIX Kernel Rebuild]]
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* [[Optimizing and tuning IRIX]]
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* [[IRIX True Color]]
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* [[IRIX Visuallogin]]
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* [[IRIX Installation and Customization]]
    
== Manuals ==
 
== Manuals ==
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== External Resources ==
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* http://www.sgistuff.net/software/irixhistory/index.html - More details regarding individual IRIX releases
   −
[[Category:SGI]] [[Category:Computing]]
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[[Category:SGI]] [[Category:Computing]][[Category:Operating Systems]]
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[[Category:UNIX]]