Ubuntu 13.04 is an open source operating system based on the highly acclaimed and award winning Debian GNU/Linux distribution. It uses the independent, in-house built Unity 3D desktop environment.
Distributed as Live DVDs for 32-bit, 64-bit and 64-bit Mac platforms
It is distributed as three Live DVD ISO images, one for each of the supported architectures (64-bit, 32-bit and 64-bit Mac). Users can use these bootable mediums to try Ubuntu without installing, run a memory test, start an existing OS, or install Ubuntu without testing it (not recommended).
Default applications include the Mozilla Thunderbird email and news client, Mozilla Firefox web browser, Nautilus file manager, Empathy multi-protocol instant messenger, Gedit text editor, Rhythmbox music player, Shotwell image viewer and organizer, and Totem video player.
In addition, it comes with the Deja Dup backup tool, Brasero CD/DVD burning software, LibreOffice office suite, Eye of GNOME image viewer, Evince document viewer, and Transmission torrent downloader.
Under the hood
Under the hood, it is powered by Linux kernel 3.8.8, X.Org 7.7, XOrg Server 1.13.3, Mesa 9.1.1, Upstart 1.8, GCC 4.7.3 toolchain, Python 3.3, and Compiz Fusion 0.9.9. Various core packages are based on the GNOME 3.6 desktop environment.
Ubuntu 13.04 is the first to enter the shorter support cycle offered by Canonical for non-LTS releases, from 18 months to 9 months. On the other hand, LTS (Long Term Support) releases are supported for five years on both Desktop and Server.
It was also the first to introduce dedicated GNOME and Chinese flavors, dubbed Ubuntu GNOME and Ubuntu Kylin, the improved Unity 7 user interface, a simplified Software Updater application, Friends social networking utility, and a modern UI for the restart/shutdown dialog.
It is no longer supported by Canonical
Dubbed Raring Ringtail, this Ubuntu release was officially announced by Canonical on April 25, 2013 and supported with critical patches, bugfixes and security updates until January 27, 2014. If you still use it, please upgrade to a newer Ubuntu release as soon as possible!