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Tcpdump is a valuable network utility that can be used for troubleshooting and debugging. This article demystifies tcpdump - examining its options, as well as a real-world use case, for debugging networking issues in your Linux environment. 


If there were one network utility that I wish had been demystified for me as a support engineer, it is the tcpdump tool. I can't count the number of times that I ran into a situation where I needed to use it for troubleshooting but didn't fully understand it or what options I needed to know. Today, I take a deep dive into the tcpdump tool—what it is used for and what you need to know. I also walk you through a mock-up of a situation I found myself in previously. Let's jump into it.