If it isn't installed, don't worry-installation is simple. You can verify this by running which tcpdump. It usually ships with most modern Linux OSs so you probably already have it. Installationīefore we begin poking around with the command, let's take a look at installing it. However, it is far lighter and is command-line only (no GUI available to my knowledge). It is probably most closely compared to Wireshark. At the most basic level, tcpdump is a packet capture tool used to troubleshoot network connectivity issues.

It works on most *nix operating systems and has a ported version for Windows. It is distributed under a BSD license and is free to download and use. The tcpdump tool was developed in the late 1980s and has been a network troubleshooting staple since that time. I also walk you through a mock-up of a situation I found myself in previously. Today, I take a deep dive into the tcpdump tool-what it is used for and what you need to know. 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. If there were one network utility that I wish had been demystified for me as a support engineer, it is the tcpdump tool. Linux system administration skills assessment.A guide to installing applications on Linux.Download RHEL 9 at no charge through the Red Hat Developer program.

Wireshark command line cheat sheet