418: I'm a teapot


   Any attempt to brew coffee with a teapot should result in the error
   code "418 I'm a teapot". The resulting entity body MAY be short and
   stout.

Quick Reference

With cURL:

~$ curl http://httpcode.info/418

Shell Command

~$ http 418

Add this to your shell's .rc file:

function http(){
    curl http://httpcode.info/$1;
}