What does curl command do?

The curl command is a command-line tool used for transferring data with URLs. It supports various protocols, including HTTP, HTTPS, FTP, and more. Here are some common uses of curl:

Retrieve Web Content: You can use curl to fetch the content of a webpage.
```
curl http://example.com
```
Download Files: You can download files from the internet.
```
curl -O http://example.com/file.zip
```
Send Data: You can send data to a server using different HTTP methods (GET, POST, PUT, DELETE).
```
curl -X POST -d "param1=value1&param2=value2" http://example.com/api
```
Custom Headers: You can include custom headers in your requests.
```
curl -H "Authorization: Bearer token" http://example.com/api
```
Verbose Mode: You can enable verbose output to see detailed information about the request and response.
```
curl -v http://example.com
```
Follow Redirects: You can make curl follow HTTP redirects.
```
curl -L http://example.com
```

These capabilities make curl a powerful tool for web development, API testing, and automation tasks.