How to tcpdump
This is a quick little page on some tcpdump completions
tcpdump -i ?-?is the network interface to usetcpdump host bob- print all packets arriving at or departing frombobtcpdump net 10.0.0.0/24- print all packets arriving at or departing from a subnettcpdump port 80- print all packets arriving at or departing from port 80