How to see HTTP headers and raw output during debugging with cURL

When debugging, it is often helpful to see the returned HTTP headers and the raw output of a curl request. This can be done using the following command:

curl -X GET -is -o /dev/stdout https://myhost

If you need information about the connection establishment and TLS handshake, you can add the -v flag to the command:

curl -X GET -isv -o /dev/stdout https://myhost