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. Values between 0 and
           999 are typically reserved for system groups.

           Any files that have the old group ID and must continue to belong to
           GROUP, must have their group ID changed manually.

       -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.

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

       MAX_MEMBERS_PER_GROUP (number)
           Maximum members per group entry. When the maximum is reached, a new
           group entry (line) is started in /etc/group (with the same name,
           same password, and same GID).

           The default value is 0, meaning that there are no limits in the
           number of members in a group.

           This feature (split group) permits to limit the length of lines in

       /etc/gshadow
           Secure group 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),
       useradd(8), userdel(8), usermod(8).



System Management Commands        09/12/2012                       GROUPMOD(8)
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