tshark:tldr:606c3

tshark: Only show packets matching a specific output filter.

tshark

$ tshark -Y '${http-request-method == "GET"}'

try on your machine

The command you provided is a command-line argument for the tool called tshark. Tshark is a command-line packet analyzer that allows you to capture and analyze network traffic.

The provided command uses the '-Y' option followed by a display filter expression enclosed in single quotes. The display filter expression is used to specify which packets should be captured and displayed by tshark.

In this case, the display filter expression is '${http-request-method == "GET"}'. Let's break it down:

'${' and '}' are used to indicate that the following expression should be evaluated by tshark.
'http-request-method' refers to the field in the captured packet that contains the HTTP method used in the request (e.g., GET, POST, etc.).
'==' is a comparison operator used to check if the value of 'http-request-method' is equal to the string "GET".
"GET" is the HTTP method we are interested in capturing.

So, the overall command 'tshark -Y '${http-request-method == "GET"}'' instructs tshark to capture and display only those packets where the HTTP request method is "GET". This can be useful when you want to analyze or extract specific HTTP GET requests from a network capture.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.

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