cURL
cURL (Client URL) is a command-line tool and library for transferring data using various network protocols, most commonly HTTP/HTTPS, but also including FTP, SFTP, SCP, and others. It is widely used for making requests to web servers, testing APIs, downloading files, and automating network tasks through scripts. The tool supports a rich set of features like authentication, cookies, headers, and proxy configurations.
Developers should learn cURL for tasks such as testing RESTful APIs, debugging web services, automating data transfers, and integrating with CI/CD pipelines. It is essential for backend development, DevOps, and system administration where command-line interaction with web resources is required, offering a lightweight and scriptable alternative to GUI tools like Postman.