tcpdump -D #Listing possible network interfaces on the system
$ tcpdump -D
1.eth0
2.eth1
3.eth2
tcpdump -c N
tcpdump -i eth1 -c 10 #Capture only N number of packets
tcpdump -i eth0 #Capture everything on a given interface
tcpdump host 10.10.10.10 #Target a specific IP
tcpdump src 11.11.11.11 #filter by source
tcpdump dst 11.10.10.11 #filter by destination