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  4. groupadd(8)

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GROUPADD(8) Befehle zur Systemverwaltung GROUPADD(8)

NAME

groupadd - erstellt eine neue Gruppe

ÜBERSICHT

groupadd [Optionen] Gruppe

BESCHREIBUNG

The groupadd command creates a new group account using the values specified on the command line plus the default values from the system. The new group will be entered into the system files as needed.

OPTIONEN

The options which apply to the groupadd command are:

-f, --force

This option causes the command to simply exit with success status if the specified group already exists. When used with -g, and the specified GID already exists, another (unique) GID is chosen (i.e. -g is turned off).

-g, --gid GID

The numerical value of the group's ID. This value must be unique, unless the -o option is used. The value must be non-negative. The default is to use the smallest ID value greater than or equal to GID_MIN and greater than every other group.

See also the -r option and the GID_MAX description.

-h, --help

zeigt die Hilfe an und beendet das Programm

-K, --key KEY=VALUE

Overrides /etc/login.defs defaults (GID_MIN, GID_MAX and others). Multiple -K options can be specified.

Example: -K GID_MIN=100  -K GID_MAX=499

Note: -K GID_MIN=10,GID_MAX=499 doesn't work yet.

-o, --non-unique

Diese Option erlaubt es, eine Gruppe mit einer nicht eindeutigen GID zu erstellen.

-p, --password PASSWORD

The encrypted password, as returned by crypt(3). The default is to disable the password.

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, --system

erstellt eine neue Systemgruppe

The numeric identifiers of new system groups are chosen in the SYS_GID_MIN-SYS_GID_MAX range, defined in login.defs, instead of GID_MIN-GID_MAX.

-R, --root CHROOT_DIR

Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory.

-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 list of usernames to add as members of the group.

The default behavior (if the -g, -N, 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

sichere Informationen zu den Gruppenkonten

/etc/login.defs

Konfiguration der Shadow-Passwort-Werkzeugsammlung

WARNUNGEN

Groupnames may contain only lower and upper case letters, digits, underscores, or dashes. They can end with a dollar sign. Dashes are not allowed at the beginning of the groupname. Fully numeric groupnames and groupnames . or .. are also disallowed.

Groupnames may only be up to 32 characters long.

Sie können einen Benutzer nicht einer NIS- oder LDAP-Gruppe hinzufügen. Dies müssen Sie auf dem entsprechenden Server durchführen.

If the groupname already exists in an external group database such as NIS or LDAP, groupadd will deny the group creation request.

RÜCKGABEWERTE

The groupadd command exits with the following values:

0

success

2

invalid command syntax

3

invalid argument to option

4

GID is already used (when called without -o)

9

group name is already used

10

can't update group file

SIEHE AUCH

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

12.07.2023 shadow-utils 4.9