Curl commands
curl is a command-line utility for transferring data from or to a server designed to work without user interaction. With curl , you can download or upload data using one of the supported protocols including HTTP, HTTPS, SCP , SFTP , and FTP . curl provides a number of options allowing you to resume transfers, limit the bandwidth, proxy support, user authentication, and much more. To Print the header: Use the -I option to fetch only the HTTP headers of the specified resource. curl -Is http://linux.com/ curl -I --http2 https://www.ubuntu.com/ With Proxy: curl supports different types of proxies, including HTTP, HTTPS and SOCKS. To transfer data through a proxy server, use the -x ( --proxy ) option, followed by the proxy URL. curl -x 192.168.44.1:8888 http://linux.com/ With Proxy & Username/Password: If the proxy server requires authentication, use the -U ( --proxy-user ) option followed by the user name and password separated by a colon ( user:passwo