NOM

       gpasswd - administer /etc/group and /etc/gshadow

SYNOPSIS

       gpasswd [option] groupe

DESCRIPTION

       The gpasswd command is used to administer /etc/group, and /etc/gshadow. Every group can
       have administrators, members and a password.

       System administrators can use the -A option to define group administrator(s) and the -M
       option to define members. They have all rights of group administrators and members.

       gpasswd called by a group administrator with a group name only prompts for the new
       password of the group.

       If a password is set the members can still use newgrp(1) without a password, and
       non-members must supply the password.

   Notes sur les mots de passe de groupe
       Les mots de passe de groupe représentent naturellement un risque en matière de sécurité,
       puisque plusieurs personnes ont connaissance du mot de passe. Cependant, les groupes sont
       utiles pour permettre la coopération entre différents utilisateurs.

OPTIONS

       Except for the -A and -M options, the options cannot be combined.

       The options which apply to the gpasswd command are:

       -a, --add user
           Add the user to the named group.

       -d, --delete user
           Remove the user from the named group.

       -h, --help
           Afficher un message d'aide et quitter.

       -Q, --root CHROOT_DIR
           Apply changes in the CHROOT_DIR directory and use the configuration files from the
           CHROOT_DIR directory.

       -r, --remove-password
           Remove the password from the named group. The group password will be empty. Only group
           members will be allowed to use newgrp to join the named group.

       -R, --restrict
           Restrict the access to the named group. The group password is set to "!". Only group
           members with a password will be allowed to use newgrp to join the named group.

       -A, --administrators user,...
           Configurer la liste des administrateurs.

       -M, --members user,...
           Configurer la liste des membres du groupe.

AVERTISSEMENTS

       This tool only operates on the /etc/group and /etc/gshadow files. Thus you cannot change
       any NIS or LDAP group. This must be performed on the corresponding server.

CONFIGURATION

       The following configuration variables in /etc/login.defs change the behavior of this tool:

FICHIERS

       /etc/group
           Informations sur les groupes.

       /etc/gshadow
           Informations sécurisées sur les groupes.

VOIR AUSSI

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