Ubuntu releases new versions every six months, and always supports them for at least 18 months with daily security fixes and patches to critical bugs. Some releases are designated as Long Term Support (LTS) versions, which have three years support for the desktop and five years for the server editions. It is intended that new LTS versions will be released every two years.
The most recent (standard) version, Ubuntu 9.10 (Karmic Koala), was released on October 29 2009.
The most recent (and second) LTS version, Ubuntu 8.04 (Hardy Heron), was released on April 24 2008.
It has been announced that the next release will be an LTS version, Ubuntu 10.04 (Lucid Lynx), scheduled for April 2010.
Each finished release has both a code name and a version number. The version number is based on the year and month of release. For example, the very first "stable" release of Ubuntu (as opposed to development versions), Ubuntu 4.10, was released on October 20, 2004.
Releases are timed to be approximately one month after GNOME releases, which are in turn about one month after releases of X.org. Consequently, every Ubuntu release comes with a newer version of both GNOME and X.
The initial download and installation of Ubuntu is of course free of charge. In addition to the free updates, and support from the ubuntu community, and this guide, there are a number of other books about Ubuntu Linux, and paid technical support is available from Canonical Ltd.
|Version||Code name||Testing name||Release date||Supported until||Features and Changes|
|5.04||Hoary Hedgehog||Array||2005-04-08||2006-10-31||Update Manager; Upgrade Notifier; readahead; grepmap; laptop suspend, hibernate and standby; dynamic frequency scaling; Ubuntu hardware database; Kickstart; installation from USB devices; UTF-8 by default; APT authentication|
|5.10||Breezy Badger||Colony||2005-10-13||2007-04-13||Usplash (graphical boot sequence); "Add/Remove..." application tool; language selector; logical volume management support; Hewlett-Packard printer support; OEM installer support; Launchpad integration|
|6.06 LTS||Dapper Drake||Flight||2006-06-01||2009-06 (desktops)||Long Term Support (LTS) release. LiveCD and Install CD merged onto one disc; Ubiquity graphical installer on LiveCD; Usplash on shutdowns; Network Manager for easy switching of multiple wired and wireless connections; 'Humanlooks' theme implemented using Tango guidelines, based on Clearlooks and featuring orange colours instead of brown; LAMP installation option; installation to USB devices; GDebi graphical installer for package files|
|6.10||Edgy Eft||Knot||2006-10-26||2008-04||Ubuntu 'Human' theme heavily modified; Upstart; automated crash reports (Apport); Tomboy notetaking application; F-spot photo manager|
|7.04||Feisty Fawn||Herd||2007-04-19||2008-10||Migration assistant; Kernel-based Virtual Machine support; easy codec and restricted drivers installation; Compiz desktop effects; Wi-Fi Protected Access support; PowerPC support dropped; Sudoku and chess games added; 'baobab' disk usage analyzer added; GNOME Control Center; Zeroconf for many devices|
|7.10||Gutsy Gibbon||Tribe||2007-10-18||2009-04||Compiz Fusion by default; AppArmor security framework; fast desktop search; fast user switching; improvements in plug-in handling for Mozilla Firefox (Ubufox); graphical configuration tool for X.org; a revamped printing system with PDF printing by default|
|8.04 LTS||Hardy Heron||Alpha||2008-04-24||2011-04 (desktops)||Long Term Support (LTS) release; Planned features include: revamped theme and artwork, better Tango compliance; robustness; compiz usability improvements; tracker integration|
|8.10||Intrepid Ibex||Alpha||2008-10-30||2010-04||Improvements to mobile computing and desktop scalability, increased flexibility for internet connectivity, an Ubuntu Live USB creator and a guest account.|
|9.04||Jaunty Jackalope||Alpha||2009-04-23||2010-10||Faster boot time, integration of web services and applications into the desktop interface, a new usplash screen, a new login screen and also support for both Wacom (hotplugging) and netbooks.|
|9.10||Karmic Koala||Alpha||2009-10-29||2011-04||A new set of boot up and shutdown splash screens, a new login screen that transitions seamlessly into the desktop, and greatly improved performance on Intel graphics chipsets.|
- Shuttleworth, Mark (2004-10-20). "Ubuntu 4.10 announcement". ubuntu-announce mailing list. https://lists.ubuntu.com/archives/ubuntu-announce/2004-October/000003.html. Retrieved 2007-09-25.
- "Announcing Beta release of Ubuntu 6.06 LTS". https://lists.ubuntu.com/archives/ubuntu-announce/2006-April/000065.html. Retrieved 2006-04-26.
- "Ubuntu 4.10 announcement". http://lwn.net/Articles/107267/. Retrieved 2007-04-13.
- Zimmerman, Matt (2006-03-28). "Ubuntu 4.10 reaches end of life on 30 April 2006". ubuntu-announce mailing list. https://lists.ubuntu.com/archives/ubuntu-announce/2006-March/000061.html. Retrieved 2007-09-25.
- "5.04 Release Notes". 2005-04-08. http://www.ubuntu.com/getubuntu/releasenotes/504. Retrieved 2007-04-14.
- Armstrong, Christina (2006-10-23). "Ubuntu 5.04 reaches end-of-life on 31 October 2006". ubuntu-security-announce mailing list. https://lists.ubuntu.com/archives/ubuntu-security-announce/2006-October/000418.html. Retrieved 2007-09-25.
- "Ubuntu 5.10 announcement". https://lists.ubuntu.com/archives/ubuntu-announce/2005-October/000038.html. Retrieved 2006-10-11.
- "Ubuntu 5.10 release notes". http://www.ubuntu.com/download/releasenotes/510. Retrieved 2006-12-21.
- Heen, Tollef Fog (2007-03-14). "Ubuntu 5.10 reaches end-of-life on April 13th 2007". ubuntu-security-announce mailing list. https://lists.ubuntu.com/archives/ubuntu-security-announce/2007-March/000504.html. Retrieved 2007-09-25.
- "Ubuntu 6.06 LTS announcement". http://www.ubuntu.com/news/606released. Retrieved 2006-12-21.
- "Ubuntu 6.06 LTS release notes". http://www.ubuntu.com/download/releasenotes/606. Retrieved 2006-12-21.
- "Ubuntu 6.10 announcement". http://www.ubuntu.com/news/610released. Retrieved 2006-10-26.
- "Ubuntu 6.10 release notes". http://www.ubuntu.com/download/releasenotes/610. Retrieved 2006-12-21.
- "Ubuntu 7.04 announcement". https://wiki.ubuntu.com/FeistyFawn. Retrieved 2007-02-06.
- "GutsyReleaseSchedule - Ubuntu Wiki". https://wiki.ubuntu.com/GutsyReleaseSchedule. Retrieved 2007-04-12.
- "Introducing the Gutsy Gibbon". 2007-04-12. https://lists.ubuntu.com/archives/ubuntu-devel-announce/2007-April/000276.html. Retrieved 2007-05-06.
- "HardyReleaseSchedule". https://wiki.ubuntu.com/HardyReleaseSchedule. Retrieved 2007-09-25.
- "Introducing the Hardy Heron". http://www.jonobacon.org/?p=1017. Retrieved 2007-08-29. "Milestone ubuntu-8.04 for Ubuntu due 2008-04-24". https://launchpad.net/ubuntu/+milestone/ubuntu-8.04. Retrieved 2007-10-23.
- Ubuntu Weekly Newsletter: Issue 36
- Ubuntu's new Linux sports debugging tool
- "Hardy Heron Artwork". Ubuntu Wiki. https://wiki.ubuntu.com/Artwork/Incoming/Hardy. Retrieved 2007-10-19.
- "Ubuntu developer summit Boston". http://arstechnica.com/news.ars/post/20071101-ubuntu-developer-summit-lays-out-vision-for-strong-hardy-heron-release.html.
- "IntrepidReleaseSchedule". https://wiki.ubuntu.com/IntrepidReleaseSchedule. Retrieved 2009-12-06.
- "Milestone ubuntu-8.10 for Ubuntu due 2008-10-30". https://launchpad.net/ubuntu/+milestone/ubuntu-8.10. Retrieved 2009-12-06.
- "JauntyReleaseSchedule". https://wiki.ubuntu.com/JauntyReleaseSchedule. Retrieved 2009-12-06.
- "Milestone ubuntu-9.04 for Ubuntu due 2009-04-23". https://launchpad.net/ubuntu/+milestone/ubuntu-9.04. Retrieved 2009-12-06.
- "KarmicReleaseSchedule". https://wiki.ubuntu.com/KarmicReleaseSchedule. Retrieved 2009-12-06.
- "Milestone ubuntu-9.10 for Ubuntu due 2009-10-29". https://launchpad.net/ubuntu/+milestone/ubuntu-9.10. Retrieved 2009-12-06.