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 floppy:x:19:
  17 games::20:
  18 gopher::30:
  19 dip::40:
  20 zmailer::47:root,petidomo,uucp,daemon,listar
  21 ftp::50:
  22 http::51:
  23 icmp:x:55:
  24 nofiles::80:
  25 qmail::81:
  26 petidomo::90:
  27 listar::91:
  28 nobody::99:
  29 users::100: