root::0:root
other::1:
bin::2:daemon,root
sys::3:admin,root,sys
adm::4:admin,daemon,root
uucp::5:root,uucp
mail::6:root
lp::8:admin,lp,root
nuucp::9:nuucp,root
daemon:*:12:daemon,root
sysadmin::14:
staff:*:20:alice,dilbert,wally
mygroup::5150:bongo,dude1,dude2,johndoe
nobody::60001:
noaccess::60002:
nogroup::65534: