NAME

       groupmod - ändert eine Gruppendefinition auf dem System

ÜBERSICHT

       groupmod [options] GROUP

BESCHREIBUNG

       The groupmod command modifies the definition of the specified GROUP by modifying the appropriate entry in
       the group database.

OPTIONEN

       The options which apply to the groupmod command are:

       -a, --append
           If group members are specified with -U, append them to the existing member list, rather than
           replacing it.

       -g, --gid GID
           The group ID of the given GROUP will be changed to GID.

           The value of GID must be a non-negative decimal integer. This value must be unique, unless the -o
           option is used.

           Bei Benutzern, für die die Gruppe die primäre Gruppe darstellt, wird der Eintrag aktualisiert, damit
           die Zuordnung zu dieser Gruppe erhalten bleibt.

           Any files that have the old group ID and must continue to belong to GROUP, must have their group ID
           changed manually.

           No checks will be performed with regard to the GID_MIN, GID_MAX, SYS_GID_MIN, or SYS_GID_MAX from
           /etc/login.defs.

       -h, --help
           zeigt die Hilfe an und beendet das Programm.

       -n, --new-name NEW_GROUP
           The name of the group will be changed from GROUP to NEW_GROUP name.

       -o, --non-unique
           When used with the -g option, allow to change the group GID to a non-unique value.

       -p, --password PASSWORD
           The encrypted password, as returned by crypt(3).

           Note: This option is not recommended because the password (or encrypted password) will be visible by
           users listing the processes.

           Sie sollten sicherstellen, dass das Passwort den Passwortrichtlinien des Systems entspricht.

       -R, --root CHROOT_DIR
           Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR
           directory. Only absolute paths are supported.

       -P, --prefix PREFIX_DIR
           Apply changes in the PREFIX_DIR directory and use the configuration files from the PREFIX_DIR
           directory. This option does not chroot and is intended for preparing a cross-compilation target. Some
           limitations: NIS and LDAP users/groups are not verified. PAM authentication is using the host files.
           No SELINUX support.

       -U, --users
           A comma-separated list of usernames to add as members of the group.

           The default behavior (if the -g and -U options are not specified) is defined by the USERGROUPS_ENAB
           variable in /etc/login.defs.

KONFIGURATION

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

DATEIEN

       /etc/group
           Informationen zu den Gruppenkonten

       /etc/gshadow
           geschützte Informationen zu den Gruppenkonten

       /etc/login.defs
           konfiguriert die Shadow-Hilfsprogramme.

       /etc/passwd
           Informationen zu den Benutzerkonten

RÜCKGABEWERTE

       The groupmod command exits with the following values:

       0
           E_SUCCESS: success

       2
           E_USAGE: invalid command syntax

       3
           E_BAD_ARG: invalid argument to option

       4
           E_GID_IN_USE: group id already in use

       6
           E_NOTFOUND: specified group doesn't exist

       9
           E_NAME_IN_USE: group name already in use

       10
           E_GRP_UPDATE: can't update group file

       11
           E_CLEANUP_SERVICE: can't setup cleanup service

       12
           E_PAM_USERNAME: can't determine your username for use with pam

       13
           E_PAM_ERROR: pam returned an error, see syslog facility id groupmod for the PAM error message

SIEHE AUCH

       chfn(1), chsh(1), passwd(1), gpasswd(8), groupadd(8), groupdel(8), login.defs(5), useradd(8), userdel(8),
       usermod(8).

shadow-utils 4.17.4                                07.05.2025                                        GROUPMOD(8)