user_sync
user_sync synchronizes the acua_users file with the passwd file. Any records with a uid field that is not associated with a login name in the password file are deleted. Also, duplicated accounts (which, of course, shouldn't exist in the first place) are taken care of. I recommend you run user_sync every month or so out of root's crontab.
Adam McKee
Last modified: Mon Apr 7 19:49:27 CST 1997