Linux Curl Command Guide

Introduction

Curl is a command-line tool for transferring data with URLs. It supports various protocols including HTTP, HTTPS, FTP, and more.

Usage

To transfer data, use the following command:

curl [options] [URL]

Common Options

• -o <file>: Save the output to a file.
• -I: Fetch the HTTP headers only.
• -L: Follow redirects.
• -d <data>: Send data in a POST request.

Examples

1. Download a file:

   curl -o file.zip https://example.com/file.zip
   

2. Fetch HTTP headers:

   curl -I https://example.com
   

3. Follow redirects:

   curl -L https://example.com
   

4. Send a POST request with data:

   curl -d "param1=value1&param2=value2" https://example.com/submit