NAME

       grpck - überprüft die Stimmigkeit der Gruppendateien

ÜBERSICHT

       grpck [Optionen] [Gruppe [ 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
           sichere 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).