I have Ubuntu 12.10 w/ LAMP stack and a Wordpress Multisite install that works. I have tried using the WPMU multi domain, I have tried also to use the Domain Mapping plugin. I'm not getting anywhere. I am able to create as many multi-site subdomain installs as I want, and they work properly, but I can't map to the primary domain.
(Example: Say my primary domain is adminsite.org, and I want to add another wordpress installation to my multisite using the domain childsite.com. The only thing I am able to do as far as I can tell, is install to *subdomain*.childsite.com. My end goal is to have a wordpress install on childsite.com, with no subdomain.)
What am I doing wrong? Is there some trick to this? Do these plugins not achieve what I'm looking to do? My IP is dedicated. I have everything set up correctly. The plugins work, just not how I had hoped... :disappointed: