Provided by: passwd_4.1.4.2-1ubuntu3_i386 bug

crypt(3).
crypt(3), for instance ! or *, users will not be able to use a unix password
gain the permissions of this group (see newgrp(1)).

administrators

    It must be a comma-separated list of user names.

    Administrators can change the password or the members of the group.

    Administrators also have the same permissions as the members (see below).

members

    It must be a comma-separated list of user names.

    Members can access the group without being prompted for a password.

    You should use the same list of users as in /etc/group.

       /etc/group

       /etc/gshadow

       gpasswd(5), group(5), grpck(8), grpconv(8), newgrp(1).

                                  09/03/2010                        gshadow(5)