etc/group

   1 root::0:root
   2 bin::1:root,bin,daemon
   3 daemon::2:root,bin,daemon
   4 sys::3:root,bin,adm
   5 adm::4:root,adm,daemon
   6 tty::5:
   7 disk::6:root
   8 lp::7:daemon,lp
   9 mem::8:
  10 kmem::9:
  11 wheel::10:root
  12 mail::12:mail
  13 news::13:news
  14 uucp::14:uucp
  15 man::15:
  16 ttyS::16:
  17 proc::17:
  18 floppy::19:
  19 games::20:
  20 slocate::21:
  21 utmp::22:
  22 audio::23:
  23 console::31:
  24 dip::40:
  25 ftp::50:
  26 http::51:
  27 nobody::99:
  28 users::1000: