GPASSWD

Section: User Commands (1)
Updated: 06/24/2006
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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.
 

SEE ALSO

newgrp(1), gshadow(5), groupadd(8), groupdel(8), groupmod(8), grpck(8), group(5).


 

Index

NAME
SYNOPSIS
DESCRIPTION
Notes about group passwords
OPTIONS
FILES
SEE ALSO

linux.jgfs.net manual pages