The right way to Use curl in Linux

by | Aug 7, 2023 | Etcetera | 0 comments

The curl command in Linux is an excellent utility that’s used to modify data from or to a neighborhood server, leveraging a big selection of protocols like HTTP, HTTPS, FTP, and SFTP.

In more effective words, it’s a tool this is serving to you turn data over the internet in an instant from your command line. For instance, you’ll use curl to acquire a file from a URL, or upload a file to a server.

This command-line instrument is not just about transferring data. You’ll moreover use curl to make HTTP requests, identical to GET and POST, from your terminal. This is extremely useful when checking out or interacting with web services and products and merchandise and APIs. With curl, you’ll even check out the content material materials of a web internet web page without if truth be told opening it in a browser, as it should smartly fetch and display the raw data.

Listed below are some other ways to use the curl command:

Fundamental Usage

The most straightforward way to use curl is to type curl followed by the use of the URL of the internet web page you wish to have to get admission to.


While you run the command curl throughout the terminal, it sends a GET request to the server positioned at The output that you just see on the terminal is the server’s response to this GET request, maximum ceaselessly the HTML content material materials of the webpage.

1. Save Output to a File

By means of default, curl outputs the provision of the internet web page that you just requested. If you want to save this output to a file, you’ll use the -o or -O selection.

curl -o output.html

The -o selection allows you to specify a filename, while -O will use the filename from the URL.

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2. Practice Redirects

If the URL you’ve requested redirects to each and every different internet web page, curl won’t observe the redirect till you include the -L selection.

curl -L
3. Send POST Requests

You’ll use curl to send POST requests. This is endlessly used when submitting bureaucracy.

curl -d "param1=value1&param2=value2" -X POST

The -d selection tells curl that you just’re going to send POST data, and the -X selection specifies the request method to use.

4. Send GET Requests with Parameters

You’ll send a GET request with parameters by the use of appending them to the URL.

5. Send Headers

You’ll add headers to your request with the -H selection.

curl -H "Accept: tool/json"
6. Use Cookies

You’ll tell curl to send cookies with the -b selection, and to store cookies with the -c selection.

curl -b "establish=price" -c cookies.txt
7. Upload Knowledge

You’ll use curl so as to add data to a server with the -F selection. This sends a POST request and devices the Content material material-Kind to multipart/form-data.

curl -F "file=@path/to/local/file"
8. Download Knowledge

You’ll use curl to acquire data using FTP, SFTP, HTTP, and numerous other protocols.

curl -O
9. Authentication

If you wish to authenticate, you’ll use the -u selection followed by the use of the username and password separated by the use of a : (colon).

curl -u username:password
Additional Linux directions:
Record Operations rmdir · cd · pwd
File Operations cat · cp · dd · much less · ls · mkdir · mv · tail · tar · zip
File System Operations chown · mkfs
Networking ping · curl · wget · iptables
Search and Text Processing in finding · grep · sed · whatis
System Wisdom and Keep watch over env · historical past · best · who
Individual and Session Keep watch over display · su · sudo

The publish The right way to Use curl in Linux seemed first on Hongkiat.

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