group —
manage group information on the system
  
    | group | add[options] group | 
  
    | group | del[options] group | 
  
    | group | info[options] group | 
  
    | group | mod[options] group | 
The group utility acts as a frontend to the
  groupadd(8),
  groupmod(8),
  groupinfo(8), and
  groupdel(8) commands. The
  utilities by default are built with EXTENSIONS. This
  allows for further functionality.
For a full explanation of the options available, please see the
    relevant manual page.
The group utility exits 0 on success,
  and >0 if an error occurs.
The group utility first appeared in
  NetBSD 1.5. It is based on the
  addnerd package by the same author.
The group utility was written by
  Alistair G. Crooks ⟨agc@NetBSD.org⟩.