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RedHat 9 (Linux i386) - man page for gpasswd (redhat section 1)

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GPASSWD(1)									       GPASSWD(1)

       gpasswd - administer the /etc/group file

       gpasswd group
       gpasswd -a user group
       gpasswd -d user group
       gpasswd -R group
       gpasswd -r group
       gpasswd [-A user,...] [-M user,...] group

       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.

       Group administrator can add and delete users using -a and -d options respectively.  Admin-
       istrators  can  use -r option to remove group password. When no password is set only group
       members can use newgrp(1) to join the group.  Option  -R  disables  access  to  the  group
       through newgrp(1) command.

       gpasswd	called	by a group administrator with group name only prompts for the group pass-
       word. If password is set the members can still newgrp(1) without a  password,  non-members
       must supply the password.

       /etc/group - group information
       /etc/gshadow - shadow group information

       newgrp(1), groupadd(8), groupdel(8), groupmod(8), grpck(8)

       Rafal Maszkowski <rzm@pdi.net>

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