The 11th major version of Ubuntu, codenamed Karmic Koala.

Ubuntu 9.10, codenamed Karmic Koala, is the 11th major version of the Ubuntu operating system. Changes in this version include the introduction of the Ubuntu Software Center and Ubuntu One, the use of the ext4 filesystem and GRUB 2 bootloader by default, and numerous usability improvements for first-time users.

This version of Ubuntu was declared end-of-life on April 30, 2011.