Kubuntu 14.04 "Trusty Tahr"
|Developer||Blue Systems, Canonical Ltd., and community contributors|
|Source model||Open source|
|Initial release||April 8, 2005|
|Latest release||15.04 (Vivid Vervet) / April 23, 2015|
|Available in||Multilingual (more than 55)|
|Update method||PackageKit and/or APT|
|Platforms||IA-32, x86-64, ARM|
|Kernel type||Monolithic (Linux)|
|Default user interface||KDE Plasma Desktop|
|License||Free software licenses
Kubuntu (// koo-BOON-too) is an official derivative of the Ubuntu operating system which uses the KDE Plasma Desktop instead of the Unity graphical environment. As part of the Ubuntu project, Kubuntu uses the same underlying systems. Every package in Kubuntu shares the same repositories as Ubuntu, and it is released regularly on the same schedule as Ubuntu.
“Kubuntu” is a registered trademark held by Canonical. It is derived from the name Ubuntu, prefixing a K to represent the KDE platform Kubuntu is built upon (following a widespread naming convention of prefixing K to the name of any software released for use on KDE platforms), as well as the KDE community.
Since ubuntu is a Bantu term translating roughly to "humanity", and since Bantu grammar involves prefixes to form noun classes, it turns out that the prefix ku- having the meaning "towards" in Bemba, kubuntu is also a meaningful Bemba word or phrase translating to "towards humanity". Reportedly, the same word by coincidence also takes the meaning of "free" (without payment) in Kirundi.
Comparison with Ubuntu
Ubuntu and Kubuntu differ typically in only the graphical applications and tools.
|Kernel & Core||Linux kernel & Ubuntu core|
|Primary toolkit||GTK+, Nux & Qt||Qt|
|Browser||Firefox||Rekonq (to 13.10), Firefox (from 14.04)|
|Email & PIM||Thunderbird||Kontact|
Kubuntu's Plasma Desktop is fully customizable without extra tools or configuration file editing. Originally designed to ease transition for users from other operating systems (such as Microsoft Windows) by allowing a similar desktop layout, the KDE Plasma Desktop incorporates widget-centric modularity that allows the user to incorporate function similar to all other operating systems and also create new functionality not found in other operating system desktops. Desktop effects are integrated in the standard KWin installation, and enabled by default.
Because Ubuntu and Kubuntu use the same sources, any application intended for one is installable and runnable on the other. Consequently, it is very common to see situations such as Firefox running on Kubuntu, or K3b running on Ubuntu.
I believe that the KDE community does phenomenal work, and having a community-driven distribution to showcase that work will help attract users and developers to the project. Our overall goal in the Ubuntu project is to further the adoption of free software on the desktop and the server, and we recognise that KDE is an essential part of the mix of desktop environments that allows people to find the best environment for their needs.— 
The Kubuntu team released the first edition, Hoary Hedgehog, on April 8, 2005.
On February 6, 2012 On April 10, 2012 Blue Systems was announced on the Kubuntu website as new sponsor. As a result, both developers employed by Canonical to work on Kubuntu – Jonathan Riddell and Aurélien Gâteau – transferred to Blue Systems.Canonical employee Jonathan Riddell announced the end of Canonical’s Kubuntu sponsorship.
|Red||Release no longer supported|
|Yellow||Release still supported|
Kubuntu follows the same naming/versioning system as Ubuntu, with each release having a code name and a version number (based on the year and month of release). Canonical provides support and security updates for Kubuntu components that are shared with Ubuntu for 18 months – five years in case of long-term support (LTS) versions – after release. Both a desktop version and an alternative (installation) version (for both x86 and AMD64 platforms) are available. Kubuntu CDs were also available through the ShipIt service (discontinued as of April 2011).
|Version||Release date||Code name||Supported until||Notes|
|5.04||2005-04-08||Hoary Hedgehog||2006-10-31||Initial release including KDE 3.4 and a selection of the most useful KDE programs. Some of these are not in the official KDE itself, including Amarok, Kaffeine, Gwenview, and K3b. Inclusion of update-manager/upgrade-notifier; Kickstart compatibility.|
|5.10||2005-10-13||Breezy Badger||2007-04-13||KDE 3.4.3 and the Guidance configuration tools. It also comes with the Adept Package Manager, the first to make use of debtags for easier searching (replacing the Kynaptic package manager used in the previous release); System Settings, a re-organised kcontrol-like centre and KDE Bluetooth; Graphical boot process with progress bar (USplash); OEM Installer Support; Launchpad tracking; GCC 4.0.|
|6.06 LTS||2006-06-01||Dapper Drake||2009-06||Long Term Support (LTS) release; Live CD and Installer on one disc; Ubiquity installer; Adept Notifier and Simplified Installer; X Display Configuration from Guidance; Better Asian language support; Avahi networking software.|
|6.10||2006-10-26||Edgy Eft||2008-04||KDE 3.5.5. This release adds the photo management application Digikam and accessibility profiles – benefiting people with disabilities. System Settings is also redesigned, and power management, laptop button support & networking are improved. Also features automated problem reports and Upstart.|
|7.04||2007-04-19||Feisty Fawn||2008-10||KDE 3.5.6; Migration assistant; KVM; Easy codec/restricted drivers installation; System Settings restructured into General and Advanced categories; Improved Hewlett-Packard printer management; KNetworkManager included; WPA support; Topic-based help system; OEM installer update; PowerPC support officially dropped.|
|7.10||2007-10-18||Gutsy Gibbon||2009-04-18||New background art. Ships with Strigi and Dolphin by default. Qt port of GDebi graphical installer for package files. Includes Restricted Drivers Manager for the first time. New kubuntu-restricted-extras package is available for download from the repositories.|
|8.04||2008-04-24||Hardy Heron||2009-10||It has two versions: KDE 3.5 and KDE 4.0 (With community support only). This version intends to provide feature parity with GNOME-based Ubuntu. This includes a port of system-config-printer to Qt to enable printer auto-detection, easy video codec installation in Kaffeine, a simple Compiz setup tool and inclusion of Bulletproof X in KDM, and automatic grabbing and releasing of the mouse cursor when running on a VMware virtual machine. Ubuntu 8.04 is a long term support release but Kubuntu 8.04 is not.|
|8.10||2008-10-30||Intrepid Ibex||2010-04-30||KDE 4.1.2 desktop environment by default, Linux 2.6.27, Xserver 1.5, Adept Manager 3, KNetworkManager 0.7, KWin desktop effects by default, various Kubuntu tool integration.|
|9.04||2009-04-23||Jaunty Jackalope||2010-10||KDE 4.2.2 desktop environment by default, kernel 2.6.28, Xserver 1.6, Adept superseded by KPackageKit, implementation of the ext4 filesystem, faster boot time., Community Supported PowerPC images added|
|9.10||2009-10-29||Karmic Koala||2011-04-28||KDE 4.3.2 desktop environment by default, GRUB 2, init system moved to Upstart, kernel 2.6.31|
|10.04 LTS||2010-04-29||Lucid Lynx||2013-05-09||Long Term Support (LTS) release. Security updates will be available for three years for desktops and five years for servers. KDE 4.4.2 desktop environment by default, kernel 2.6.32, KPackageKit 0.5.4, Firefox KDE integration, touchpad configuration module by default.|
|10.10||2010-10-10||Maverick Meerkat||2012-04||KDE Software Compilation 4.5. Faster login. Default browser changed to Rekonq. New bluetooth stack. Pulseaudio inclusion. Updated Kpackagekit with categories. Global menu for netbook. Updated Installer. Combining of the Desktop and Netbook Editions (autodetection).|
|11.04||2011-04-28||Natty Narwhal||2012-10-28||KDE SC 4.6, kernel 2.6.38, GStreamer multimedia backend for Phonon, GTK Oxygen theme, games in the default install, UDisks and UPower replace HAL.|
|11.10||2011-10-13||Oneiric Ocelot||2013-05-09||KDE SC 4.7, kernel 3.0.3, replacing kpackagekit with Muon Software Centre, kubuntu low fat setting, OpenGL ES Powered Desktop Effects, Kdepim 4.7.2|
|12.04 LTS||2012-04-26||Precise Pangolin||2017-04||The third Kubuntu LTS release. KDE SC 4.8, kernel 3.2.0.|
|12.10||2012-10-18||Quantal Quetzal||2014-04||LibreOffice 184.108.40.206., Rekonq 1.1, KDE SC 4.9.2|
|13.04||2013-04-25||Raring Ringtail||2014-01||KDE SC 4.10, Muon Suite 2, LibreOffice 4, Optional Homerun launcher, out-of-the-box MTP support|
|13.10||2013-10-17||Saucy Salamander||2014-06||KDE SC 4.11.2, LibreOffice 4.1.2 rc3|
|14.04 LTS||2014-04-17||Trusty Tahr||2019-04||KDE SC 4.13.0, LibreOffice 220.127.116.11, Default Browser changed back to Firefox|
|14.10||2014-10-23||Utopic Unicorn||2015-06||KDE SC 4.14, KDE Plasma 5 as technical preview.|
|15.04||2015-04-23||Vivid Vervet||2015-12||KDE Plasma 5.2.2 is now the default desktop environment. Adaptation to systemd and to SDDM. A behind-the-scenes work on the change to Wayland.|
|15.10||2015-10-22||Wily Werewolf||2016-06||KDE Plasma 5.4., Firefox 41.0, LibreOffice 5.0..|
The desktop version of Kubuntu currently supports the Intel x86 and the AMD64 architectures. Some releases support other architectures including: SPARC, PowerPC, IA-64 (Itanium), and PlayStation 3 (however, a firmware update from Sony in April 2010 disabled OtherOS, making the PS3 unable to run other operating systems).
The minimum system requirements for a desktop installation are a 700 MHz x86 processor, 512 MB of RAM, 5 GB of hard drive space, and a video card which supports VGA at 640×480 resolution. The recommended system requirements for the desktop installation are a 1 GHz or better x86 processor, 1 GB of RAM, 15 GB of hard drive space, and a video card which supports VGA at 1024×768 resolution, and optionally supporting visual effects.
|Desktop & Laptop|
|Processor||1 GHz (x86)||Better than 1 GHz (x86)|
|Memory||512 MB||1 GB|
|Hard drive capacity||4 GB||10 GB|
|Video card||VGA @ 640×480||VGA @ 1024×768|
A Kubuntu distribution, by La Laguna University, is used in more than 3,000 computers spread in several computer labs, laboratories and libraries, among other internal projects in the Canary Islands.  Since October 2007, Kubuntu is now used in all of the 1,100 state-run schools in the Canary Islands.
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|Wikimedia Commons has media related to Kubuntu.|
- Official website
- Kubuntu at DistroWatch
- Kubuntuguide – Help manual (unofficial), tips, FAQ, and software guide