Получаем http заголовки с сайта

$ curl -I ru.najomi.org/_nix/

HTTP/1.1 200 OK
Server: nginx/0.7.65
Date: Fri, 24 Feb 2012 20:37:50 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
X-Powered-By: PHP/5.3.2-1ubuntu4.10
Set-Cookie: PHPSESSID=ci7l86pv8ns2uao3bpcc14a1o4; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache

Подменить домен при обращении к серверу

$ curl -H 'Host: ru.najomi.org' http://198.199.122.14