su 


setup

ifconfug eth0

service network restart

syster-config-users

unmount/dev/cdrom
 

ls

ll

ln

cat

cal

del

add

group

chgrp

chmod

chown

cp

file

mv

cd

rm

which

umask

vim

man

help

head

tail

passwd

chage

touch

more

w

less

who

list

cp

id

chkonfig

xinetd

unmount

mount