[CentOS] user management solution needed

>> If thats all you need in place, a ldap based setup would work - perhaps
>> even CDS
>
> Could you point me at examples of either of these?
>
> It is not clear to me where LDAP comes in - for authentication I
> guess.   But what about managing the password files?  Or does one not
> have to do that?

Only on the LDAP master server. Once configured, all users have only one
source for usernames and passwords; change it there, and it's visible
everywhere.

     mark