Release information for Ubuntu 8.04 LTS Release Candidate

Subject: Announcing Ubuntu 8.04 LTS Release Candidate

The Ubuntu team is pleased to announce the Release Candidate for Ubuntu 8.04 LTS (Long-Term Support) on desktop and server. Codenamed "Hardy Heron", 8.04 LTS continues Ubuntu's proud tradition of integrating the latest and greatest open source technologies into a high-quality, easy-to-use Linux distribution.

We consider this release candidate to be complete, stable, and suitable for testing by any user.

Ubuntu 8.04 LTS Desktop Edition features incremental improvements to familiar applications, with an emphasis on stability for this second Ubuntu long-term support release, and is easier than ever to try out with the new Wubi installer.

Ubuntu 8.04 LTS Server Edition follows in the footsteps of Ubuntu 7.10 with even more virtualization support and security enhancements - enabling AppArmor for more applications by default, improving protection of kernel memory against attacks, and supporting KVM and iSCSI technologies out of the box.

The Ubuntu 8.04 LTS family of variants, Kubuntu, Xubuntu, UbuntuStudio, and Mythbuntu, also reach RC status today.

The final release of Ubuntu 8.04 LTS is scheduled for 24 April 2008 and will be supported for three years on the desktop and five years on the server.

Before installing or upgrading to Ubuntu 8.04 LTS please read

About The Release Candidate

The purpose of the Release Candidate is to solicit one last round of testing before the final release. Here are ways that you can help:

* Upgrade from Ubuntu, Kubuntu, or Edubuntu 7.10 to the Release Candidate by following the instructions given above.

* Participate in installation testing using the Release Candidate CD images, by following the testing and reporting instructions at

Desktop features

Improved application selection: the GNOME desktop sports a number of improvements to the default applications, including more feature-full clients for BitTorrent and VNC, as well as an advanced UI for mastering CDs and DVDs.

File browsing: an enhanced filesystem layer brings greater performance and flexibility to Nautilus, the GNOME file browser.

Pluggable audio and video output: the PulseAudio sound server is integrated in the GNOME desktop for more flexible sound output, and a new Screen Resolution utility allows easier configuration of multiple video displays.

Wubi installer: a new Windows-based installer option makes it easier than ever to try out Ubuntu, letting users install a full desktop on Windows systems without needing to partition their hard drive.

Server features

AppArmor profiles: a greater number of server applications are now protected by default with AppArmor, a kernel technology that limits the resources an application is allowed to access, providing added protection against undiscovered security vulnerabilities.

Memory protection: additional protection now prevents direct access to system memory through /dev/mem and /dev/kmem, and the lower 64K of system memory is no longer addressable by default, changes which help to defend against malicious code. The kernel now also loads Position Independent Executables at randomized addresses, making it harder for application security vulnerabilities to be exploited.

Virtualization and iSCSI: KVM is now an officially maintained option, which combined with libvirt (CLI) and virt-manager (GUI) management tools allows for a simple and efficient virtualization option on hardware that supports virtualization extensions (AMD-V or Intel-VT). Mounting iSCSI targets is now supported (including in the installer), allowing Ubuntu to interoperate with this class of cost-efficient Storage Area Network solutions.

Ubuntu Education Edition

Add-on configuration: Edubuntu is now provided as an add-on to Ubuntu rather than a separate stand-alone flavor, permitting even greater reuse of Ubuntu technologies.

Kubuntu features

Kubuntu comes with the rock solid KDE 3 for those who want a commercially supported desktop.

For those who want something more exciting, a KDE 4 Remix is available bringing this cutting edge new version to you first.

Please see for details.

Xubuntu features

Xubuntu comes with the light-weight Xfce 4.4.2 desktop environment for those who want to a desktop that is easy to use, but places particular emphasis on conserving system resources.

New additions to the family

Two new variants join us for this Ubuntu release. UbuntuStudio and Mythbuntu have done releases separately in the past, and with Hardy Heron we're happy to be able to welcome these fine community projects into the main Ubuntu release process.

For a more in-depth tour of the features new in 8.04 LTS, see

About Ubuntu

Ubuntu is a full-featured Linux distribution for desktops, laptops, and servers, with a fast and easy install and regular releases. A tightly-integrated selection of excellent applications is included, and an incredible variety of add-on software is just a few clicks away.

Professional technical support is available from Canonical Limited and hundreds of other companies around the world. For more information about support, visit

To Get the Ubuntu 8.04 LTS Release Candidate CD

To perform a new installation or try out 8.04 LTS "live" from CD, download the Ubuntu 8.04 LTS Release Candidate (choose the mirror closest to you):

Europe: (Belgium) (Bulgaria) (Croatia) (Denmark) (France) (Great Britain) (Greece) (Ireland) (Italy) (The Netherlands) (The Netherlands) (Norway) (Portugal) (Spain) (Sweden)

Asia/Pacific: (Taiwan) (Australia) (New Zealand)

Africa: (South Africa)

North America: (United States)

South America: (Brazil)

Rest of the world: (Great Britain)

Please download using Bittorrent if possible. See for more information about using Bittorrent.

Upgrading from Ubuntu 7.10 and Ubuntu 6.06 LTS

To upgrade to Ubuntu 8.04 LTS Release Candidate from Ubuntu 7.10 or Ubuntu 6.06 LTS, follow these instructions:

Feedback and Helping

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

Your comments, bug reports, patches, and suggestions will help turn this release into the best release of Ubuntu ever. Please report bugs through the Launchpad bug tracker:

If you have a question, or if you think you may have found a bug but aren't sure, first try asking on the #ubuntu IRC channel on FreeNode, on the Ubuntu Users mailing list, or on the Ubuntu forums:

More Information

You can find out more about Ubuntu and about this preview release on our website, IRC channel, and wiki. If you are new to Ubuntu, please visit:

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