Ubuntu 13.04 正式发布，新版本包含Unity 7 / Libreoffice 4 /Upstart 1.8等等。
组件方面包含：
Linux kernel 3.8.8
Unity 7
Upstart 1.8
LibreOffice 4.0
CUPS 1.6.2 and cups-filters 1.0.34
Python 3.3
下载地址：
http://releases.ubuntu.com/13.04/ (Ubuntu Desktop and Server)
http://cloud-images.ubuntu.com/releases/13.04/release/ (Ubuntu Cloud Server)
http://cdimage.ubuntu.com/netboot/13.04/ (Ubuntu Netboot)
http://cdimage.ubuntu.com/ubuntu-core/releases/13.04/release/ (Ubuntu Core)
http://cdimage.ubuntu.com/edubuntu/releases/13.04/release/ (Edubuntu DVD)
http://cdimage.ubuntu.com/kubuntu/releases/13.04/release/ (Kubuntu)
http://cdimage.ubuntu.com/lubuntu/releases/13.04/release/ (Lubuntu)
http://cdimage.ubuntu.com/ubuntustudio/releases/13.04/release/ (Ubuntu Studio)
http://cdimage.ubuntu.com/ubuntu-gnome/releases/13.04/release/ (Ubuntu-GNOME)
http://cdimage.ubuntu.com/ubuntukylin/releases/13.04/release/ (UbuntuKylin)
http://cdimage.ubuntu.com/xubuntu/releases/13.04/release/ (Xubuntu)
官方通告：https://wiki.ubuntu.com/RaringRingtail/TechnicalOverview
Ubuntu 13.04 十个最佳新特性：http://blog.ubuntusoft.com/ubuntu-13-04-new-features.html
