tcpdump example

 

The following provide good examples for capturing of the packets and editing the packets

https://www.tecmint.com/12-tcpdump-commands-a-network-sniffer-tool/ 

https://www.thegeekstuff.com/2010/08/tcpdump-command-examples/

https://www.thegeekstuff.com/2009/02/editcap-guide-11-examples-to-handle-network-packet-dumps-effectively/