root::0:root
bin::1:root,bin,daemon
daemon::2:root,bin,daemon
sys::3:root,bin,adm
adm::4:root,adm,daemon
tty::5:
disk::6:root
lp::7:daemon,lp
mem::8:
kmem::9:
wheel::10:root
mail::12:mail
uucp::14:uucp
man::15:
games::20:
gopher::30:
video::39:
dip::40:
ftp::50:
lock::54:
audio::63:
nobody::99:
users::100: