How to point a domain name to a subdomain

Hello all,

I did some research on what I want to achieve, and I've read some stuff about it. It's not exactly what I am looking for though.

Here's the situation: I own two domain names, domainA.com and domainB.com.domainA.com has hosting, the other one is just a domain name.There is a subdomain subdomain.domainA.com on which a forum is hosted.What I want to achieve is that when people visit the forum ( subdomain.domainA.com ), that the link in their browser is "converted" to domainB.com. (So it looks like a standalone website)I also want people that go to domainB.com, to keep seeing domainB.com. But actually they are in subdomain.DomainA.com. Not sure if this requires a different step, or I can just redirect domainB.com to the subdomain.domainA.com and then "convert" it back to domainB.com with the trick above.I don't really mind how it's implemented, but I prefer a .htaccess file (on subdomain.domainA.com).

Apologies if this sounds a bit confusing, and thanks for your help in advance!

 

I assume the following folders:
domainA.com points to public_html/ folder
domainB.domanA.com ->public_html/domainB/ folder

Then, you can simply go to cpanel,
then click addon domain,
add you new domain domainB.com and select the folder public_html/domainB

 

yes right steps!