Sniffing for Packets
tcpdump -i any
tcpdump -i eth0 tcp port 80
tcpdump -i eth0 tcp port 80 or 443
tcpdump -i eth0 icmp
tcpdump -i eth0 icmp6
tcpdump -i any
tcpdump -i eth0 tcp port 80
tcpdump -i eth0 tcp port 80 or 443
tcpdump -i eth0 icmp
tcpdump -i eth0 icmp6