Hi,
http://www.linuxquestions.org/questions/linux-server-73/bulk-user-add-script-693777/
This link discusses adding bulk users to a system.
This may help you.
--
Regards,
T.Shrinivasan
My experiences with Linux are here
http://goinggnu.wordpress.com
For Free and Open Source Jobs
http://fossjobs.wordpress.com