Ubuntu announced its 13.04 (Raring Ringtail) release almost 9 months
ago, on April 25, 2013. This was the first release with our new 9
month support cycle and, as such, the support period is now nearing
its end and Ubuntu 13.04 will reach end of life on Monday, January
27th. At that time, Ubuntu Security Notices will no longer include
information or updated packages for Ubuntu 13.04.

The supported upgrade path from Ubuntu 13.04 is via Ubuntu 13.10.
Instructions and caveats for the upgrade may be found at:

https://help.ubuntu.com/community/SaucyUpgrades

Ubuntu 13.10 continues to be actively supported with security updates
and select high-impact bug fixes. Announcements of security updates
for Ubuntu releases are sent to the ubuntu-security-announce mailing
list, information about which may be found at:

https://lists.ubuntu.com/mailman/listinfo/ubuntu-security-announce

Since its launch in October 2004 Ubuntu has become one of the most
highly regarded Linux distributions with millions of users in homes,
schools, businesses and governments around the world. Ubuntu is Open
Source software, costs nothing to download, and users are free to
customise or alter their software in order to meet their needs.

On behalf of the Ubuntu Release Team,

Adam Conrad