According to the packages lists, 6.01 has the package x11-xfs-utils . 5.01 CD has packages xfsdump and xfsprogs . 5.3.1 DVD has x11-xfs-utils xfsdump and xfsprogs . I'm not sure which package, if any, contains the utility that you are looking for, I'll leave that to you. Overall, people have been pretty disappointed by the contents of the 6.x releases, but have been able to use apt-get to add what is missing. If you have the newest version then you have 6.01, I would really suggest that you use the Documentation link near the top of this page and use a BitTorrent client to download the 5.3.1 DVD ISO (then burn it at slow speed), your Knoppix experience will be very different (although 5.3.1 is very poorly organized and most of the packages ended up in "lost and found" rather than where they should be in the menus).