12 Tcpdump Commands – A Network Sniffer Tool

In our previous article, we have seen 20 Netstat Commands to monitor or mange Linux network. This is our another ongoing series of packet sniffer tool called tcpdump. Here, we are going to show you how to install tcpdump and then we discuss and cover some useful commands with their practical examples.

Linux tcpdump command examples

tcpdump is a most powerful and widely used command-line packets sniffer or package analyzer tool which is used to capture or filter TCP/IP packets that received or transferred over a network on a specific interface. It is available under most of the Linux/Unix based operating systems. tcpdump also gives us a option to save captured packets in a file for future analysis. It saves the file in a pcap format, that can be viewed by tcpdump command or a open source GUI based tool called Wireshark (Network Protocol Analyzier) that reads tcpdump pcap format files.

How to Install tcpdump in Linux

Many of Linux distributions already shipped with tcpdump tool, if in case you don’t have it on systems, you can install it using following Yum command.

# yum install tcpdump

Once tcpdump tool is installed on systems, you can continue to browse following commands with their examples.

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