NAME
       gpasswd - administer the /etc/group file
SYNOPSIS
       gpasswd group
       gpasswd -a user group
       gpasswd -d user group
       gpasswd -R group
       gpasswd -r group
       gpasswd [-A user,...] [-M user,...] group
DESCRIPTION
       gpasswd is used to administer the /etc/group file (and /etc/gshadow file if compiled with
       SHADOWGRP defined). Every group can have administrators, members and a password. System
       administrator can use -A option to define group administrator(s) and -M option to define
       members and has all rights of group administrators and members.
   Notes about group passwords
       Group passwords are an inherent security problem since more than one person is permitted
       to know the password. However, groups are a useful tool for permitting co-operation
       between different users.
OPTIONS
       Group administrator can add and delete users using -a and -d options respectively.
       Administrators can use -r option to remove group password. When no password is set only
       group members can use newgrp to join the group. Option -R disables access via a password
       to the group through newgrp command (however members will still be able to switch to this
       group).
       gpasswd called by a group administrator with group name only prompts for the group
       password. If password is set the members can still newgrp(1) without a password,
       non-members must supply the password.
FILES
       /etc/group
          Group account information.
       /etc/gshadow
          Secure group account information.