Thank you all. I answered myself after got a simpler solution.. Now WP has new features for multi-sites. It appropriates not only sub-folder structure, but also with different domain name. Just set the new site URL as a sub-folder under main site first then re-set it again to another URL (e.g. No-IP...

Hello everyone, I am running one wordpress site well, by using LAMP and a free no-ip ddns which is easily to visit from public network because I don't have fixed ip address. Now I am planing to have another wordpress site for different topic but have no idea how to set it. I don't want to be known t...