Fra http://ext4.wiki.kernel.org/index.php/Ext4_Howto#For_people_who_are_running_Ubuntu:
For people who are running Ubuntu, it is *highly* recommended that you download a set of modified util-linux packages and install them. Packages for Ubuntu Hardy are available here: ftp://ftp.kernel.org/pub/linux/kernel/people/tytso/ubuntu-fixed-util-linux. These packages revert a change made by Ubuntu: http://changelogs.ubuntu.com/changelogs/pool/main/u/util-linux/util-linux_2.12r-19ubuntu1/changelog to use the volid library instead of the blkid library. The volid library has a number of shortcomings, including that they don't work on freshly created filesystems or swap devices until after you reboot (since it is tied to udev probing) and the volid library doesn't understand ext4dev filesystems. The blkid library is much better, and Debian uses the blkid library for util-linux. Unfortunately, Ubuntu chose to make this reason for some unknown reason. For other versions of Ubuntu, the patch that was applied can be found here: ftp://ftp.kernel.org/pub/linux/kernel/people/tytso/ubuntu-fixed-util-linux/util-linux-patch. Update: From 9 January daily builds: http://cdimage.ubuntu.com/daily/current/ of Jaunty will include ext4 as a partitioning option. As far as I can tell, it installs and boots fine (including full ext4 /; you don't need a separate /boot). Here is the announcement, It will be included in 9.04 and maybe it will be by default option in 9.10: http://brainstorm.ubuntu.com/idea/16854/
Altså:
- Hardy Heron (8.04): ftp://ftp.kernel.org/pub/linux/kernel/people/tytso/ubuntu-fixed-util-linux
- Intrepid Ibex: (8.10), og andre Ubuntus end Hardy er en såkaldt patch (rettelse), hvilket betyder at der skal bygges en specialtilpasset kerne, hvilket nok er for nørdet for de fleste. Link til patchen (rettelse): ftp://ftp.kernel.org/pub/linux/kernel/people/tytso/ubuntu-fixed-util-linux/util-linux-patch
- Januty (9.04): ext4fs vil blive inkluderet. Se http://brainstorm.ubuntu.com/idea/16854/
- I 9.10 vil ext4fs være standard valg for formattering af partitions. Se http://brainstorm.ubuntu.com/idea/16854/
/Lars