tcpdump - A command-line packet analyzer
It dumps all tcp connections from a .pcap file. Also tcpdump prints out a description of the contents of packets on a network interface that match the Boolean expression
Installation
https://www.tcpdump.org/
Usage
tcpdump -nntttAr <nameOfFile.pcap>
# Exit after receiving count packets.
-c count
# Save the packet data to a file for later analysis
-w
# Read from a saved packet file
-r
# Print out all captured packages
-A