GroupAdd
groupadd(8) creates a group.
Installation
Linux and BSD distributions will either have groupadd(8) pre-installed, or direct users to instead use addgroup(8).
Usage
groupadd GROUPNAME
To force a specific ID, try:
groupadd --gid 1234 example
GroupMod
To modify an exising group, such as renaming it, use groupmod(8):
groupmod --new-name newname oldname
GroupDel
To delete a group, use groupdel(8).
groupdel GROUPNAME