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Tuesday, September 21, 2021

How to Perform a POST Request Using Curl – Linux Hint

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Curl is a free and open-source command-line utility that allows network connections to be generated by users. On Windows, Linux, and Mac, Curl is open, rendering it the take-to option for programmers throughout all channels.

With diverse levels of information, we can make the post queries. Some test queries for POST are given below:

Making a simple POST request

Enter the following command on the command-line to make an easy POST request through curl.

$ curl -X POST https://example.com/

Sending additional fields with a POST request

You can send additional fields with the help of the -d flag and coupling it with the POST request you send to the server. The following POST call sends a user and a transfer area together with the critical parameters.

$ curl -d “user=user1&pass=abcd” -X POST https://example.com/login

The -d option to POST with curl will provide a standard header that looks like:

# Content-Type: application/x-www-form-urlencoded

Specifying the Content-Type in POST request

You can use the -H flag to send a piece of data or a header with a curl. The command that follows sends a JSON object with a request.

$ curl -d ‘{json}’ -H ‘Content-Type:application/json’ https://example.com/login

Exchanging files with CURL

Using curl, we can also transfer entire files on the command line. Although, in this case, it won’t upload any data as the site we are accessing is not found. To do this, the command is shown as:

$ curl –form “[email protected]” https://example.com/resource.cgi


This article shows the importance of the Curl command in Linux and discusses the usage of curl post requests on Linux. I clarified how to make POST requests using the CURL command.

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