[CentOS] Adduser help

Fri Mar 9 19:39:30 UTC 2007
Robert Moskowitz <rgm at htt-consult.com>


there is the following adduser command:

adduser --no-create-home --ingroup openpbx --disabled-password 
--disabled-login openpbx

This does NOT seem to be the right format for Centos.  So far, using 
man, I have come up with;

adduser -M -g openpbx

What else do I need?