gpasswd 1 User Commands 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. 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 newgrp1 without a password, non-members must supply the password. /etc/group group account information /etc/gshadow secure group account information newgrp1 , groupadd8 , groupdel8 , groupmod8 , grpck8 , group5 , gshadow5 Rafal Maszkowski <rzm@pdi.net>