mmsitepass − Set the Mailman site password, prompting from the terminal.
mmsitepass [options] [password]
Set the list creator password instead of the site password. The list creator is authorized to create and remove lists, but does not have the total power of the site administrator.
Print a small help text and exit
Including the admin-password on the command line is a small security risk if you have untrusted users on the system.
The site password can be used in most if not all places that the list administrator’s password can be used, which in turn can be used in most places that a list users password can be used.
Mailman documentation on http://www.list.org/ and in /usr/share/doc/mailman.