Are you using the Drupal content management system?
Want to run more than one Drupal site from your server? This should get you started. I'm presuming that you have root access to your Drupal box and it is called sandbox.local .
0. Set up a single site Drupal installation
Start a default, single site installation working by following the excellent instructions. Make sure that you can browse it by hostname. You do have local DNS , or a hosts file, right? You have it right when you can browse the site at sandbox.local .