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groupmod


SYNOPSIS

       groupmod [options] GROUP


DESCRIPTION

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


OPTIONS

       The options which apply to the groupmod command are:

       -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
           Display help message and exit.

       -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.


CONFIGURATION

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

           Note: split groups may not be supported by all tools (even in the
           Shadow toolsuite). You should not use this variable unless you
           really need it.


FILES

       /etc/group
           Group account information.

       /etc/gshadow
           Secure group account information.

       /etc/login.defs
           Shadow password suite configuration.

       /etc/passwd
           User account information.


EXIT VALUES

       The groupmod command exits with the following values:

       0
           success

       2
           invalid command syntax

       3
           invalid argument to option

       4
           specified group doesn't exist

       6
           specified group doesn't exist

       9
           group name already in use

       10
           can't update group file


SEE ALSO

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


shadow-utils 4.1.5.1 11/05/2016 GROUPMOD(8)



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