See the list of interfaces on which tcpdump can listen: tcpdump -D

Listen on interface eth0: tcpdump -i eth0

Listen on any available interface (cannot be done in promiscuous mode. Requires Linux kernel 2.2 or greater): tcpdump -i any

Be verbose while capturing packets: tcpdump -v

Be more verbose while capturing packets: tcpdump -vv

Be very verbose while capturing packets: tcpdump -vvv

Be less verbose (than the default) while capturing packets: tcpdump -q

Limit the capture to 100 packets: tcpdump -c 100

Record the packet capture to a file called capture.cap: tcpdump -w capture.cap

Record the packet capture to a file called capture.cap but display on-screen how many packets have been captured in real-time: tcpdump -v -w capture.cap

Display the packets of a file called capture.cap: tcpdump -r capture.cap

Display the packets using maximum detail of a file called capture.cap: tcpdump -vvv -r capture.cap

Display IP addresses and port numbers instead of domain and service names when capturing packets: tcpdump -n

Capture any packets where the destination host is 192.168.1.1. Display IP addresses and port numbers: tcpdump -n dst host 192.168.1.1

Capture any packets where the source host is 192.168.1.1. Display IP addresses and port numbers: tcpdump -n src host 192.168.1.1

Capture any packets where the source or destination host is 192.168.1.1. Display IP addresses and port numbers: tcpdump -n host 192.168.1.1

Capture any packets where the destination network is 192.168.1.0/24. Display IP addresses and port numbers: tcpdump -n dst net 192.168.1.0/24

Capture any packets where the source network is 192.168.1.0/24. Display IP addresses and port numbers: tcpdump -n src net 192.168.1.0/24

Capture any packets where the source or destination network is 192.168.1.0/24. Display IP addresses and port numbers: tcpdump -n net 192.168.1.0/24

Capture any packets where the destination port is 23. Display IP addresses and port numbers: tcpdump -n dst port 23

Capture any packets where the destination port is is between 1 and 1023 inclusive. Display IP addresses and port numbers: tcpdump -n dst portrange 1-1023

Capture only TCP packets where the destination port is is between 1 and 1023 inclusive. Display IP addresses and port numbers: tcpdump -n tcp dst portrange 1-1023

Capture only UDP packets where the destination port is is between 1 and 1023 inclusive. Display IP addresses and port numbers: tcpdump -n udp dst portrange 1-1023

Capture any packets with destination IP 192.168.1.1 and destination port 23. Display IP addresses and port numbers: tcpdump -n “dst host 192.168.1.1 and dst port 23”

Capture any packets with destination IP 192.168.1.1 and destination port 80 or 443. Display IP addresses and port numbers: tcpdump -n “dst host 192.168.1.1 and (dst port 80 or dst port 443)”

Capture any ICMP packets: tcpdump -v icmp

Capture any ARP packets: tcpdump -v arp

Capture either ICMP or ARP packets: tcpdump -v “icmp or arp”

Capture any packets that are broadcast or multicast: tcpdump -n “broadcast or multicast”

Capture 500 bytes of data for each packet rather than the default of 68 bytes: tcpdump -s 500

Capture all bytes of data within the packet: tcpdump -s 0