addgroup <group>
Example:
addgroup Testers
Creates a new group. Every group can have one or more administrators that distribute the work (e.g. adding, deleting & modifying users) amongst them.
delgroup <group>
Example:
delgroup Testers
This command deletes a group. For safety, you can only delete a group that does not have members.
rengroup <oldgroupname> <newgroupname>
Example:
rengroup test Testers
Use this command to give a group a new name.