UbuntuLinux是一份完整的桌面Linux操作系统，它可免费获得，并带有社团及专业的支持。Ubuntu社团按照Ubuntu宣言里所铭记的思想而组建：软件应免费提供，软件工具应能以人们本地语种的形式可用且不牺牲任何功能，人们应拥有定制及改变他们软件的自由，这包括以任何他们认为适宜的方式。Ubuntu是一个古非洲语单词，意指对他人的博爱。Ubuntu Linux发行将这种博爱之心带到了软件的世界中。

Steve Langasek has announced the availability of the release candidate for Ubuntu 9.04 "Jaunty Jackalope": "TheUbuntu team is pleased to announce the Release Candidate for Ubuntu9.04 Desktop and Server editions and Ubuntu Netbook Remix. Ubuntu 9.04Desktop edition brings faster boot speeds and a new notification systemto your everyday computing experience. Ubuntu 9.04 Server edition makesit easy to experiment with cloud computing using Eucalyptus on your ownservers, and sports an improved mail server integration stack based onPostfix and Dovecot. Ubuntu 9.04 Netbook Remix brings a new,easy-to-use interface that is designed to be used on the smallerscreens of netbook devices." Read the release announcement and release notes for a detailed list of changes and new features. Download (MD5): ubuntu-9.04-rc-desktop-i386.iso (699MB, torrent), ubuntu-9.04-rc-desktop-amd64.iso (698MB, torrent). Also released today: Kubuntu 9.04 RC (release notes), Xubuntu 9.04 RC (release notes), Ubuntu Studio 9.04 RC and Mythbuntu 9.04 RC.

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