NAME

       grpck - überprüft die Stimmigkeit der Gruppendateien

ÜBERSICHT

       grpck [options] [group [ shadow ]]

BESCHREIBUNG

       The grpck command verifies the integrity of the groups information. It checks that all entries in
       /etc/group and /etc/gshadow have the proper format and contain valid data. The user is prompted to delete
       entries that are improperly formatted or which have other uncorrectable errors.

       Es wird überprüft, ob jeder Eintrag folgende Eigenschaften aufweist:

       •   die richtige Anzahl von Feldern

       •   einen eindeutigen und gültigen Gruppennamen

       •   a valid group identifier (/etc/group only)

       •   a valid list of members and administrators

       •   a corresponding entry in the /etc/gshadow file (respectively /etc/group for the gshadow checks)

       The checks for correct number of fields and unique group name are fatal. If an entry has the wrong number
       of fields, the user will be prompted to delete the entire line. If the user does not answer
       affirmatively, all further checks are bypassed. An entry with a duplicated group name is prompted for
       deletion, but the remaining checks will still be made. All other errors are warnings and the user is
       encouraged to run the groupmod command to correct the error.

       The commands which operate on the /etc/group and /etc/gshadow files are not able to alter corrupted or
       duplicated entries. grpck should be used in those circumstances to remove the offending entries.

OPTIONEN

       The -r and -s options cannot be combined.

       The options which apply to the grpck command are:

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

       -r, --read-only
           Execute the grpck command in read-only mode. This causes all questions regarding changes to be
           answered no without user intervention.

       -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.

       -s, --sort
           Sort entries in /etc/group and /etc/gshadow by GID.

       -S, --silence-warnings
           Suppress more controversial warnings, in particular warnings about inconsistency between group
           members listed in /etc/group and /etc/ghadow.

       By default, grpck operates on /etc/group and /etc/gshadow. The user may select alternate files with the
       group and shadow parameters.

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/passwd
           Informationen zu den Benutzerkonten

RÜCKGABEWERTE

       The grpck command exits with the following values:

       0
           success

       1
           invalid command syntax

       2
           one or more bad group entries

       3
           can't open group files

       4
           can't lock group files

       5
           can't update group files

SIEHE AUCH

       group(5), groupmod(8), gshadow(5), passwd(5), pwck(8), shadow(5).

shadow-utils 4.17.4                                07.05.2025                                           GRPCK(8)