APACHE2
to enable a new virtual host simply type:
sudo a2ensite mysiteavailable-site
to disable a virtual host:
sudo a2dissite mysiteavailable-site
sudo /etc/init.d/apache2 restart
http://www.debuntu.org/2006/02/22/7-virtual-hosting-using-apache-2
http://wiki.ubuntu.org.cn/index.php?title=Apache%E8%99%9A%E6%8B%9F%E4%B8%BB%E6%9C%BA%E6%8C%87%E5%8D%97&variant=zh-tw
