I am not getting the status line, date, server, last modified etc after making an http request using curl command

If you carefully notice the above screenshot, you will find that there is a typo in the URL itself.

Command is - curl GET http://data.pr4e.org/romeo.txt HTTP/1.0

but -v is missing in your command.

Correct command - curl -v GET http://data.pr4e.org/romeo.txt HTTP/1.0