NAME

       groupadd - erstellt eine neue Gruppe

ÜBERSICHT

       groupadd [OPTIONEN] NEWGROUP

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.

       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.

       On Debian, the only constraints are that groupnames must neither start with a dash ('-')
       nor plus ('+') nor tilde ('~') nor contain a colon (':'), a comma (','), or a whitespace
       (space:' ', end of line: '\n', tabulation: '\t', etc.).

       On Ubuntu, the same constraints as Debian are in place, with the additional constraint
       that the groupname cannot be fully numeric. This includes octal and hexadecimal syntax.

       Groupnames may only be up to 32 characters long.

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. GID 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
           permits the creation of a group with an already used numerical ID. As a result, for
           this GID, the mapping towards group NEWGROUP may not be unique.

       -p, --password PASSWORD
           defines an initial password for the group account. PASSWORD is expected to be
           encrypted, as returned by crypt (3).

           Without this option, the group account will be locked and with no password defined,
           i.e. a single exclamation mark in the respective field of ths system account file
           /etc/group or /etc/gshadow.

           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. Only absolute paths are supported.

       -P, --prefix PREFIX_DIR
           Apply changes to configuration files under the root filesystem found under the
           directory PREFIX_DIR. 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

       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).