I've got about 50 servers running a mix of RHEL and CentOS, and they all use local authentication. We are about to get these finally under a single unit's control, and we have a slew of local accounts all across these systems. I'm not sure if I want to authenticate off of LDAP from our existing Active Directory or use something like CentOS Directory Server, but either way.. Can I map a central account to different local accounts on these systems? I don't really want to have to worry about changing any existing permissions or anything.
Let's say I have joeuser1 on 3 different systems, and he has a different UID and his group has a different GID on each one. Is there a way to tie them all together with central authentication?