If you got the message
Your AFS client does not seem to be working.
or
aklog: unable to obtain tokens for cell athena.mit.edu (status: 11862788)
when you run renew or aklog, or you get an error like
Starting AFS services: AFS module /lib/modules/2.6.22-14-generic/fs/openafs.o does not exist. Not starting AFS. Please consider building kernel modules using instructions in /usr/share/doc/openafs-client/README.modules
when your computer boots after a kernel update or when debathena-afs-config is installing, you are probably missing OpenAFS modules for your kernel. To fix this problem, follow the directions below. (Missing OpenAFS modules is the most common problem, although AFS might fail to restart for other reasons, like that it is in use, or /var/cache/openafs is not on an ext2 or ext3 filesystem.)
If you are running a supported distribution either Ubuntu Karmic or newer or Debian Squeeze or newer, then you can simply
sudo aptitude install openafs-modules-dkms sudo /etc/init.d/openafs-client restart
DKMS will automatically build and install modules for your kernel when the kernel is upgraded.
If you are running the stock kernel of a supported distribution either Ubuntu Hardy or older or Debian Lenny or older, then you can use our metapackages to ensure that OpenAFS modules get automatically installed for the most recent available kernel.
On Ubuntu, run
sudo aptitude install openafs-modules-generic sudo /etc/init.d/openafs-client restart
Or on Debian, run
sudo aptitude install openafs-modules-2.6-686 sudo /etc/init.d/openafs-client restart
(You may need to specify a flavor other than generic or 686 if you are using a kernel flavor other than the default.)
If you built your own kernel, then you will also need to build your own OpenAFS modules before you can use AFS.
Needing new OpenAFS modules is also likely the problem if you get an error message similar to the following when you try to install openafs-modules-`uname -r`.
Couldn't find any package whose name or description matched "openafs-modules-2.6.23"
To build and install OpenAFS modules for your kernel, run:
aptitude install module-assistant; m-a a-i openafs