I am using Ubuntu telnet client. I am trying to send 2 lines over the telnet connection that I have made.
For example:
> telnet en.wikipedia.org 8
The real reason is this.
For windows users, it is well known that cmd is case-insensitive by default.
But in windows, the editing interface of telnet is case sensitive!
Same for unix, Ubuntu, etc.
If you enter: GET /wiki/Main_Page http/1.1, you will get the wrong result.
If you enter: GET /wiki/Main_Page HTTP/1.1, you will get the result you want.
This telnet problem took me hours, damn it.