Instruction from Bob:

Here is how to setup afs:
Install the following packages (these are from the standard sl6 repo):
kmod-openafs
openafs
openafs-module-tools
openafs-krb5
openafs-client

You should make sure afs starts at boot and the only customization
required is, after installing the above and before starting the afs
service, do "echo cern.ch >/usr/vice/etc/ThisCell" as root.

To gain access to non-public files at cern you need to 1) get a kerberos
ticket with kinit and 2) issue the aklog command to translate it to an
afs token.