Tecadmin published a cURL tutorial showing you how to display request headers and response headers.

cURL – How to display request headers and response headers

The request headers contain the information about the resource that is required to be fetched. The response headers contain information about the response sent by the server. It’s something like server details and other information. cURL is a command line utility used to transmit data over the different-2 protocols. 

cURL – How to display request headers and response headers – TecAdmin