groupadd - add a new group to the system group file
# groupadd [options] <group>
This program adds a new group to the system.
This program must be run as root.
-g, --gid gid: The group identifier for the new group. If not specified, an unused GID above 100 will be auto-generated.-U, --users user-list: A comma-separated list of usernames to add as members of the new group/etc/group - new group information (such GID) is appended to this file.# groupadd -g 110 contributors
# groupadd maintainers