Perhaps NIS is what you want to use here.

This also helps keep the accounts in sync (eg if password is changed on 1 server it changes for all).

If your likely to need to run other commands on all these 50 servers I'd suggest getting passwordless ssh working between your box and the 50. you can then do something like:

Code:

for server in sever1 server2 server3
do
    ssh $server sudo mkuser pgrp=srvadm gecos=Spears, Brittney auditclasses=ALL sugroups=system,security user01
done