Revision 52 as of 2014-04-14 10:30:34

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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.

Get Ubuntu 14.04

Upgrading from Ubuntu 13.10

To upgrade from Ubuntu 13.10 on a desktop system:

  • Open Software Sources.
  • Press Alt+F2 and type in "update-manager" (without the quotes) into the command box.
  • Update Manager should open up and tell you: New distribution release '14.04' is available.
  • Click Upgrade and follow the on-screen instructions.

To upgrade from Ubuntu 13.10 on a server system:

  • Install the update-manager-core package if it is not already installed.

  • Launch the upgrade tool with the command sudo do-release-upgrade.

  • Follow the on-screen instructions.

Note that the server upgrade will use GNU screen and automatically re-attach in case of 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.

Support lifespan

Ubuntu 14.04 will be supported for 5 years for Ubuntu Desktop, Ubuntu Server, Ubuntu Core, and Kubuntu. All other flavours will be supported for 3 years.

Download Ubuntu 14.04

Images can be downloaded from a location near you.

You can download 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 14.04

Please see the Trusty 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 Ubuntu 14.04.

For a list of all packages being accepted for Ubuntu 14.04, please subscribe to trusty-changes.

Linux kernel 3.13

Ubuntu 14.04 includes the 3.13.0-19.39 Ubuntu Linux kernel which was based on the v3.13.6 upstream Linux kernel.

Python 3.4

We eventually intend to ship only Python 3 with the Ubuntu desktop image, not Python 2. The Ubuntu 14.04 image continues this process, although we will not be able to convert everything to Python 3 for the Ubuntu 14.04 release.

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.


AppArmor has a number of new features in Ubuntu 14.04 LTS. Notably:

  • Support for fine-grained mediation of signal(7)
  • Support for fine-grained mediation of ptrace(2)
  • Improved DBus mediation
  • New abstractions for applications running under Unity
  • Several new tunables supporting XDG user directories, dovecot and more
  • Various policy updates in support of new features and bug fixes
  • A new @{profile_name} variable to reference the current profile name within policy

  • New Python and Python3 AppArmor libraries (python-apparmor and python3-apparmor)

AppArmor policy has been adjusted for packages that ship it to work with these changes, but local policy may need to be adjusted, especially for signal and ptrace rules. See man 5 apparmor.d for details.


Oxide is a webview based on Chromium to deliver web content. Oxide allows us to better support 3rd party developers and applications within the Ubuntu archive by providing a fast, secure and up to date webengine library for the duration of the LTS. While other web content libraries such as those based on webkit are available, their maintenance will be limited to new upstream minor version releases only, and application developers are encouraged to use Oxide instead.

Upstart 1.12.1

Upstart has been upgraded to version 1.12.1. More details are available in the Upstart Technical Overview.

Ubuntu Server

Puppet 3

Ubuntu 14.04 includes Puppet 3. This is a major version upgrade from previous Ubuntu LTS releases and includes many changes which are not compatible with Puppet 2.7.x.

Please review the upstream release notes to determine which breaking changes apply to your installation.

Xen 4.4

Ubuntu 14.04 includes Xen 4.4. This is a significant upgrade from the previous release. Of particular note the xen hypervisor no longer supports 32bit only CPUs on the x86 architecture; 32bit Dom 0 running on the 64bit hypervisor is still supported. The hypervisor will automatically be upgraded to the 64bit version (the Dom 0 does not need to change). Ensure your host is 64bit capable _before_ upgrading.

Also the XM (xend) management stack has been deprecated since Xen 4.1 and will be removed in the next version of Xen (4.5). Therefore we urge all users to start using the new xl toolstack. For that reason the default toolstack setting (/etc/default/xen) is changed to xl.

The format of normal configuration files is mostly identical, only usage of Python inside the config file is no longer supported. Also managed domains, which were managed by xend and stored in a different (sxpr) format will need to be migrated. When upgrading to Xen-4.4 an automatic migration of xend managed domains into xen and libvirt config files is attempted. However, due to many dependencies, this is failing more often than not. So when upgrade has been done and the host is running the new Xen hypervisor, the migration into xen config files can be started by calling "sudo /usr/lib/xen-4.4/bin/xen-migrate-xend-managed-domains". The resulting config files are written into /etc/xen and should be reviewed before usage.

Likewise, when libvirt is used to manage machines, the xend managed domains can be migrated into libvirt xml definitions by calling "sudo libvirt-migrate-xend-managed-domains". The resulting definitions should also get reviewed before usage (either virt-manager, virsh or looking in /etc/libvirt/libxl).

Once the new VM configs are working, it is recommended to remove the old ones (/var/lib/xend/domains/). This is not done automatically for safety reasons.

Ceph 0.79

Ubuntu 14.04 includes Ceph 0.79; Ceph will be upgraded to the Firefly stable release via a stable release update when 0.80 is released upstream. This release of Ceph includes efficient erasure coding of data for cold storage and tiered pooling. Please refer to the upstream release notes for full details on upgrading.

Qemu 2.0.0

Ubuntu 14.04 includes Qemu 2.0.0. Due to incompatibilities in the emulated hardware, KVM virtual machines created on 12.04 cannot be live migrated to 14.04. Likewise, virtual machine snapshots from 12.04 cannot be restored on 14.04. Memory snapshots can be restored, and virtual machines created on 13.10 can be migrated to 14.04.

Open vSwitch 2.0.1

Ubuntu 14.04 includes Open vSwitch 2.0.1. See the upstream release notes for details of all features included in this release. Note that the openvswitch-datapath-dkms package is not compatible with the Linux 3.13 kernel shipped as default in 14.04; The native Open vSwitch module in the 3.13 kernel provides all the features of the dkms module apart from support for experimental LISP tunnelling and should be used instead.

Libvirt 1.2.2


MAAS 1.5


Juju 1.18.1

Ubuntu 14.04 includes the latest stable release of Juju, the service orchestration tool for Ubuntu. See the upstream release notes for full details of all new features and improvements in this release. Existing 1.16.6 juju environments can be upgraded to 1.18.1 by running:

juju upgrade-juju


Further notes about this release of Kubuntu can be found at:


Further notes about this release of Xubuntu can be found at:


Further notes about this release of Edubuntu can be found at:


Further notes about this release of Lubuntu can be found at:

Ubuntu Studio

Further notes about this release of Ubuntu Studio can be found at:

Ubuntu Kylin

Further notes about this release of Ubuntu Kylin can be found at:

Ubuntu GNOME

Further notes about this release of Ubuntu GNOME can be found at:


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 this release of Ubuntu 14.04. 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

  • The desktop image installer cannot unlock existing encrypted (LUKS) volumes. If you need to make use of existing encrypted volumes during partitioning, then use the "Try Ubuntu without installing" boot option to start a live session, open the encrypted volumes (for example, by clicking on their icons in the Unity launcher), enter your password when prompted to unlock them, close them again, and run ubiquity to start the installer. (1066480)

  • When using installer to upgrade or reinstall an existing installation with encrypted swap, the installer may fail to reuse the partition. A warning will be shown, however the installation can be completed. The installed system will not have swap activated and users are advised to recreate swap on their systems. Please see advice about adding and activating swap at: (1172002)

  • Installs on very small memory systems may fail to start or exit without completing with no error. It is recommended that swap be created before install for such systems. Please see advice about adding and activating swap at: (1172161)

  • In rare circumstances the 'Next' button on the installer 'Install Type' screen is non-functional. This is intermittent and may be resolved by hitting 'Back' and retrying. (1172572)

  • On some systems, after installation, pressing 'Enter' doesn't reboot the system and a hard reset is required (1297851)

  • Live session starts with keyboard set to English US and time zone as UTC even if non-english languages are selected (1297234)


  • During upgrades from 12.04 LTS in graphical mode (with update-manager -d) prompts are displayed in the terminal window of the upgrader. To proceed with the upgrade, read the question and if you agree, click in the terminal window of the upgrader, press the 'Tab' key until the focus in on '<Ok>' and validate with 'Enter' (1298281)

Power Management

  • On some systems, when opening lid, there is a kerneloops with a suspend/resume failure message seen. (1054732)


Graphics and Display


  • In order to improve compatibility with other local nameserver packages, NetworkManager now assigns IP address to the local nameserver process that it controls instead of If the system's /etc/resolv.conf is absent or is a static file instead of the symbolic link to ../run/resolvconf/resolv.conf installed by default then this static file will have to be updated by the administrator in order to continue using the NetworkManager-controlled nameserver.


  • The major tools in apparmor-utils AppArmor 2.8.95 have been rewritten to improve maintainability. While this allows us to better support them and add fixes going forward, currently the aa-genprof and aa-logprof CLI tools contain several bugs (1294797, 1296218) that affect their utility. These bugs should be fixed before release or in an SRU. It is recommended that people develop policy manually at this time.


Ubuntu Server

Ubuntu Core




Ubuntu Studio


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

Reporting 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.

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: