O.K. I got this
`This assumes that /etc/webmin is the Webmin configuration directory.
[root@ns10 webmin]# ./changepass.pl
usage: changepass.pl
This program allows you to change the password of a user in the Webmin
password file. For example, to change the password of the admin user
to foo, you would run:
changepass.pl /etc/webmin admin foo
This assumes that /etc/webmin is the Webmin configuration directory.
[root@ns10 webmin]#
`