Something

root::0:root
daemon::2:root,bin,daemon
bin::1:root,bin,daemon
sys::3:root,bin
adm::4:root,daemon
tty::5:
disk::6:root
lp::7:cupsys
mail::8:
news:x:9:
uucp:x:10:
man:x:12:
proxy:x:13:
kmem::15:
dialout:x:20:cupsys,bob1955
fax:x:21:
voice:x:22:
cdrom:x:24:bob1955
floppy:x:25:bob1955
tape:x:26:
sudo:x:27:bob1955
audio::29:bob1955
dip:x:30:bob1955
www-data:x:33:
backup:x:34:
operator:x:37:
list:x:38:
irc:x:39:
src:x:40:
gnats:x:41:
shadow:x:42:
utmp:x:43:
video::44:bob1955
sasl:x:45:
plugdev:x:46:bob1955
staff:x:50:
games:x:60:
users:x:100:
nogroup:x:65534:
fuse:x:101:root
crontab:x:102:
ssh:x:103:
lpadmin:x:104:
scanner:x:105:cupsys,bob1955
saned:x:106:
netdev:x:107:bob1955
messagebus:x:108:
avahi:x:109:
haldaemon:x:110:
powerdev:x:111:bob1955
bob1955:x:1000: