Slackware is actually the one distro I've succeeded deeply with AFS. One thing that made everything less buggy is to find out what your UID , User ID, was, on the OSX UNIX-compatible system e.g. 1001, let's say, and just make sure the co-responging AFS user/share on the other end shared the same. - No bugged idea why it matters but within linux' AFS implementation paired with OS X it seems to be crucial for some reason, and a lot less headaches.

So therefore: user ' osxking ' with UID ' 1001 ' connects best to user ' osxking ' UID ' 1001 ' on your Slackware AFS server. Good luck man! It will work! < 3 Happy AFS'ing, Slackware served me well!