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ab: Execute 100 HTTP POST requests to a URL, using a JSON payload from a file.
$ ab -n ${100} -T ${application-json} -p ${filename-json} ${url}
try on your machine

This command appears to be using the ab (Apache HTTP server benchmarking tool) to perform some HTTP request testing. Let's break down the command:

  • ab is the command to invoke the Apache benchmarking tool.
  • -n ${100} is an option that specifies the number of requests to send to the server. "${100}" is likely a placeholder for an actual number, such as 100, representing the number of requests.
  • -T ${application-json} is an option that sets the content type of the data being posted to the server. "${application-json}" is again a placeholder, representing the content type "application/json".
  • -p ${filename-json} is an option that specifies the file containing the data to be posted. "${filename-json}" is a placeholder for the actual name of the JSON file to be used.
  • ${url} is another placeholder, representing the URL of the server to which the requests will be sent.

In summary, this command is using the Apache benchmarking tool (ab) to send a specified number of requests to a server using the specified content type and data file. The requests are likely intended to test the server's performance or measure its response time.

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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