ping (sending packets to other computers)
traceroute (find server location)
nslookup (name service lookup)
ssh (secure shell)
shutdown -r now (shutdown (restart) now)
sudo (super user do)
su (super user)
ps
fsck -yf (directory repair)
netmask
ip address
TCP/IP
DNS
HW address
firewalls
stealth mode
SSID (
RSSI
man (manual)
ctrl-c, ctrl-z
exit
ls
kill
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