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The Ubuntu developers are moving quickly to bring you the absolute latest and greatest software the Open Source community has to offer. The Ubuntu 13.04 Release is the next version of Ubuntu.

Get Ubuntu 13.04

Upgrading from Ubuntu 12.10

To upgrade from Ubuntu 12.10 on a desktop system:

To upgrade from Ubuntu 12.10 on a server system:

Note that the server upgrade will use GNU screen and automatically re-attach in case of e.g. dropped connection problems.

Offline upgrade options via alternate CDs are no longer offered for Ubuntu Desktop and Ubuntu Server. Please ensure you have network connectivity to one of the official mirrors or to a locally accessible mirror and follow the instructions above.

Upgrading from other releases

Users of other Ubuntu releases need to upgrade first to 12.10, and then to 13.04.

For further information on upgrading to 12.10, please see its upgrade instructions.

Ubuntu downloader for Windows discontinued

Due to various bugs in Wubi that have not been addressed in time for the final release, the Ubuntu team will not be releasing the Wubi installer with 13.04. You can read more about this decision here. Users who wish to try out Ubuntu without repartitioning a Windows system are encouraged to use a live system instead, booted from either a DVD or a USB disk.

Support lifespan reduced

Ubuntu 13.04 will only be supported for 9 months. Previous non-LTS releases were supported for 18 months. For more information, please read the announcements here or here.

Download Ubuntu 13.04

13.04 images can be downloaded from a location near you.

You can download 13.04 ISOs from: (Ubuntu Desktop and Server) (Ubuntu Cloud Server) (Ubuntu Netboot) (Ubuntu Core) (Edubuntu DVD) (Kubuntu) (Lubuntu) (Ubuntu Studio) (Ubuntu-GNOME) (UbuntuKylin) (Xubuntu)

New features in 13.04

Please see the Raring blueprint list for details.

Please test and report any bugs you find:

Updated Packages

As with every new release, packages--applications and software of all kinds--are being updated at a rapid pace. Many of these packages came from an automatic sync from Debian's unstable branch; others have been explicitly pulled in for 13.04 Raring Ringtail.

For a list of all packages being accepted for 13.04 Raring Ringtail, please subscribe to raring-changes.

Linux kernel 3.8.8

Ubuntu 13.04 includes the 3.8.0-19.29 Ubuntu Linux kernel which was based on the v3.8.8 upstream Linux kernel.

Unity 7

Unity 7 brings a lot of performance improvements, reduced memory consumption and a great number of small UI fixes to bring a better overall shell experience. Those are like being typo-tolerant in the dash when searching for an application, using the mouse scroll wheel on a launcher icon to switch between applications or better available third party devices handling. You will notice as well some new icons themes to continue on lead of bringing design as the central Ubuntu experience.

You will notice that only one workspace is available by default on any new installation. If you want to bring back workspaces, you can find an option in the Appearance panel of System Settings under the Behavior tab. You can as well enable "Show desktop" button on the Launcher.

Upstart 1.8

This release provides a new bridge, the upstart-file-bridge(8) that allows jobs to react to filesystem changes. For example, to have a job start when a particular file is created:

start on file FILE=/var/log/foo.log EVENT=create

Or to start a job when a file matching a glob pattern is deleted:

start on file FILE=/var/app/*.foo EVENT=delete

See upstart-file-bridge(8) and file-event(7) for further details.

Additionally, a new upstart-monitor(8) tool is available that allows event flows to be observed in real-time. This tool can run as a graphical or console application.

LibreOffice 4.0

for all details, see:






CUPS 1.6.2 and cups-filters 1.0.34

We had already switched to CUPS 1.6.x in Quantal (12.10) but had to apply a huge, awkward Ubuntu-specific patch to avoid regressions. Now we are up to all new standards without needing to do anything Ubuntu-specific.

Most important change here is the way how network printing works. Formerly, a CUPS-specific mechanism was used. The server broadcasted information about the printers it shares and the clients listen to these broadcasts making the printers available on the client side, looking like local print queues for the applications.

Recently, the Printer Working Group (PWG), an association of printer and software industry for developing standards related to digital printing, has created a standard for broadcasting information about shared printers. This standard is broadcasting the information via Bonjour, a protocol also used for many other network services, like shared files systems, screens, music/video servers, ...

CUPS has adopted this standard in 1.6.x, but only broadcasts and does not listen to broadcasts of CUPS daemons (or generally print servers using Bonjour) on other machines, letting remote printers not automatically get available locally. CUPS also dropped the old broadcasting protocol without transition period.

To overcome the problems and keeping network printing as easy as before (this is why 10 years ago the distros switched to CUPS) the cups-filters project of OpenPrinting introduced cups-browsed, an extra daemon which by default listens to Bonjour broadcasts of remote CUPS daemons (of IPP printers coming soon) and automatically creates local print queues pointing to the shared printers making pure CUPS 1.6.x networks working out-of-the-box.

If your network still contains machines running CUPS 1.5.x and older, cups-browsed also has legacy support for the old CUPS broadcasting, browsing (listening), and BrowsePoll. Please see the comments in /etc/cups/cups-browsed.conf, edit the file appropriately, and restart cups-browsed ("sudo restart cups-browsed") or reboot. When upgrading to Raring, BrowsePoll directives are overtaken from CUPS to cups-browsed automatically.

For everyone developing embedded or mobile systems based on Ubuntu, the CUPS package is split up into more binary packages to get a minimum client-only printing stack, of the packages cups-daemon, libcups2, and cups-browsed, occupying only ~1 MB. This only listens for Bonjour broadcasts (legacy CUPS broadcasts and BrowsePoll optional) of remote CUPS servers and makes the printers available locally. No drivers and filters for locally connected printers are available then.

Another thing to mention which was available before but never told about in release notes: When sharing local printers they are automatically available also for Apple's iOS devices (iPhone, iPad, iPod touch).

Python 3.3

We eventually intend to ship only Python 3 with the Ubuntu desktop image, not Python 2. The Ubuntu 13.04 image continues this process, although we will not be able to convert everything to Python 3 for Ubuntu 13.04 final image.

If you have your own programs based on Python 2, fear not! Python 2 will continue to be available (as the python package) for the foreseeable future. However, to best support future versions of Ubuntu you should consider porting your code to Python 3. Python/3 has some advice and resources on this.


Automatic Apport crash reporting has been enabled by default again to catch problems early on. It now checks for duplicates on the client side, which will avoid uploading debug data and creating Launchpad bug reports unnecessarily in many cases now.

Software Updater

Software Updater in 13.04 has a simplified details panel that most prominently shows applications and manually-installed packages. Libraries and packages that belong to the base system are collected under a single item.


Upstart User Sessions (technology preview)

This Ubuntu release includes a "tech preview" of Upstart User Sessions, which allow Upstart to supervise a user's desktop session. This feature is disabled by default for Ubuntu 13.04, but can be manually enabled for testing.

To enable Upstart User Sessions for all users:

  1. Uncomment "ubuntu" in file /etc/upstart-xsessions.

  2. Logout of any desktop sessions.
  3. Login to the default Unity session.

To disable, simply comment out "ubuntu", logout and log back in again.

To see details of the running Upstart session, either echo $UPSTART_SESSION to see the D-Bus address the Session Init process is listening to, or run the following command which lists the process id of the Upstart session along with the value of $UPSTART_SESSION:

$ initctl list-sessions

The normal suite of Upstart commands is available (such as initctl, start, and stop). For example, to list all session jobs, run:

$ initctl list

To list system jobs from within a user session, run one of the following two commands:

$ initctl --system list
$ sudo initctl list

Session jobs are read from /usr/share/upstart/sessions/ and $XDG_CONFIG_HOME/upstart/ (or $HOME/.config/upstart if $XDG_CONFIG_HOME is not set).

Session job output is logged to $XDG_CACHE_HOME/upstart/ (or $HOME/.cache/upstart/ if $XDG_CACHE_HOME is not set).

See init(5) for full details.


Social networking for 13.04 is now handled by the Friends service, which replaces the backend Gwibber provided in previous Ubuntu releases. There is no transition required, if you have social networking accounts setup in Ubuntu Online Accounts, the Friends service will just work. The Gwibber lens in Unity has been replaced with a Friends lens and works in much the same way. The Gwibber client application is no longer included by default, for similar functionality friends-app can be installed from Software Center.

Ubuntu Server

OpenStack Grizzly

Ubuntu 13.04 includes the Grizzly release of Openstack. OpenStack projects supported in 13.04 include: Nova, Glance, Swift, Keystone, Horizon, Cinder and Quantum. Ceilometer is also included in 13.04 in Ubuntu Universe.

Openstack Grizzly is also available for Ubuntu Server 12.04 LTS in the Ubuntu Cloud Archive.

OpenStack continues to be deployable using Juju Charms; for the Grizzly release this also includes deploying OpenStack in a highly avaliable configuration as demonstrated at the OpenStack Summit in Portland. See the OpenStack HA Reference architecture documentation for more details.


Ubuntu 13.04 includes the 0.7 release of Python Juju ('juju' package).

The initial release (1.10.0) of the Go rewrite of Juju ('juju-core' package) is available in the -backports repository, this package is co-installable with the 0.7 version.

You can revert to the default (0.7) version by using the following:

$ sudo update-alternatives --set juju /usr/lib/juju-0.7/bin/juju

or to the new 1.10.0 release using:

$ sudo update-alternatives --set juju /usr/lib/juju-1.10.0/bin/juju

Please note that the 1.10.0 (Go version) release is not yet end-user feature complete compared to 0.7 - for example, the LXC local provider is not yet implemented in 1.10.0; if you install both you will get 0.7 by default.

See the Juju documentation for full details of these changes.


Ubuntu 13.04 includes the latest MAAS release (1.3). This new upstream release includes various bug fixes and improvements in comparison to older MAAS releases. New features include:

Simple Streams

There is now machine formated JSON data describing all downloadable content for Ubuntu cloud images. The data format is called "simple streams", and can be found at . There is a sample client included in Ubuntu in the 'simplestreams' package. The client can be used to keep cloud or local downloads in sync with what is available from Ubuntu.

Ceph 0.56.4

Ubuntu 13.04 includes the latest Ceph Bobtail LTS release (0.56.4). OpenStack Keystone integration has been implemented in the RADOS Gateway for this release, providing a drop-in replacement for Swift.

Ceph continues to be deployable using Juju Charms; notable changes include:

For full details on upgrading please see the Ceph release notes.

MongoDB 2.2.4

Ubuntu 13.04 includes MongoDB 2.2.4; for this release SSL support has been enabled to support secured use of MongoDB (primarily to support Juju 2.0). The ARM support has also been improved during the 13.04 development cycle.

This release of MongoDB will also be provided as an official backport for 12.04 and 12.10.

OpenvSwitch 1.9.0

Ubuntu 13.04 includes the latest stable release of OpenvSwitch 1.9.0, featuring full upstream support for Linux 3.8. As of this release, the bridge compatibility module is officially deprecated - users should start planning to migrate away from this feature. For full details of this release please see the upstream release notes.



Starting with 13.04, Xubuntu targets a 1GB USB. For more information about Xubuntu 13.04, read the Xubuntu release announcement.



Please read the Release notes for information.

Ubuntu Studio

For information about the Ubuntu Studio Beta release, please see RaringRingtail/UbuntuStudio.


UbuntuKylin has had several bug fixes applied to chinese-calendar and indicator-china-weather, made fcitx as default and improved the theme since Beta 1. For information about the UbuntuKylin Beta release, please see UbuntuKylin/1304-ReleaseNotes.

Ubuntu GNOME

Known issues

As is to be expected, at this stage of the release process, there are some significant known bugs that users may run into with the Ubuntu 13.04 release. The ones we know about at this point (and some of the workarounds), are documented here so you don't need to spend time reporting these bugs again:

Boot, installation and post-install


Graphics and Display



Ubuntu Server


Ubuntu GNOME

For a listing of more known issues, please refer to the Raring Ringtail bug tracker in Launchpad.

Reporting bugs

It should come as no surprise that this release of Ubuntu 13.04 contains other bugs. Your comments, bug reports, patches and suggestions will help fix bugs and improve the quality of future releases. Please report bugs using the tools provided.

If you want to help out with bugs, the Bug Squad is always looking for help.

Ubuntu Project Contributors

Ubuntu 13.04 would not be possible without the contributions of our developers, testers, release team members, documentation writers, translators, bug analysts and our users who take the time to file bugs. Ubuntu is based on Debian, the Linux Kernel and our many other excellent upstream projects. Thank you!

Participate in Ubuntu

If you would like to help shape Ubuntu, take a look at the list of ways you can participate at

More information

You can find out more about Ubuntu on the Ubuntu website and Ubuntu wiki.

To sign up for future Ubuntu development announcements, please subscribe to Ubuntu's development announcement list at:

RaringRingtail/ReleaseNotes (last edited 2013-09-12 05:28:28 by shankao)