Finding UID’s in MacOS X 10.5/10.6
Was helping setup a VM/NFS share on a friends OSX machine using all_squash to remap the UID and GID. Unfortunately OSX doesn’t like using the /etc/group file as traditional linux, doesn’t provide uid and gid commands or the Netinfo utility. So to cut to the chase, to list the UIDs of the local users:
dscl /Local/Default -list /Users UniqueID
I’m sure altering the last “UniqueID” value (as it’s referred to as a ‘key’) will yeild more interesting info, this is left as an excercise to the reader

I think I’ve done that before, to get my laptop to work with AFS at uni, I had to change my uid on my laptop to be the same as my uid on the linux system at uni.