tshark:tldr:51c4b

The tshark command is a powerful network protocol analyzer tool that allows you to capture, analyze, and interpret network traffic in real-time from a command-line interface.

Here are some key aspects of the tshark command:

• Syntax: tshark [options] [capture filter]
• Options: tshark offers numerous options to control the behavior of the capture and analysis, including specifying the input file, output formats, display filters, and more.
• Capture Filters: You can define filters to capture specific network traffic based on various criteria like source/destination IP address, port numbers, protocol, or specific packet contents.
• Output Formats: tshark provides multiple output formats to display the captured packets and their details, such as the ASCII summary view, packet details with protocol information, or even exporting the data to a file for further analysis with other tools.
• Display Filters: While capturing or viewing captured traffic, you can apply display filters to selectively show only the packets that match certain criteria. For example, you could filter for HTTP traffic only or filter to show packets related to a specific IP address.

Using tshark, you can analyze network protocols and troubleshoot network issues. It can decode a wide range of protocols and display detailed information about each packet, such as protocol headers, source/destination addresses, packet timing, payload data, and more.

Note that tshark is part of the Wireshark suite, which is a popular graphical network protocol analyzer; however, tshark is a command-line version of it, allowing automation and analysis on systems without a graphical interface.