How to configure Joomla to open by more than one domain?In order to configure Joomla to work by more than one domain follow these steps:
1. Park the additional domains to your account. This can be done from cPanel, Parked domains;
2. Open Joomla's configuration.php file and make this change:
$mosConfig_live_site = 'http://'.$_SERVER['HTTP_HOST'];
In case your Joomla is in a subdirectory you have to specify the name of the subdirectory:
$mosConfig_live_site = 'http://'.$_SERVER['HTTP_HOST'].'/directoryname';
Note to substitute directoryname with the the directory name in which Joomla resides.