groupmod

NAMN

groupmod - ändra en gruppdefinition på systemet

BESKRIVNING

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

FLAGGOR

The options which apply to the groupmod command are:

-a, --append GID

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.

Users who use the group as primary group will be updated to keep the group as their primary group.

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

Visa hjälpmeddelande och avsluta.

-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.

You should make sure the password respects the system's password policy.

-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 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.

CONFIGURATION

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

FILER

/etc/group

Gruppkontoinformation.

/etc/gshadow

Säker gruppkontoinformation.

/etc/login.defs

Shadow password suite configuration.

/etc/passwd

Användarkontoinformation.

AVSLUTNINGSVÄRDEN

The groupmod command exits with the following values:

E_SUCCESS: success

E_USAGE: invalid command syntax

E_BAD_ARG: invalid argument to option

E_GID_IN_USE: group id already in use

E_NOTFOUND: specified group doesn't exist

E_NAME_IN_USE: group name already in use

E_GRP_UPDATE: can't update group file

E_CLEANUP_SERVICE: can't setup cleanup service

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

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

SE OCKSÅ

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

23-03-2023

shadow-utils 4.13