Same WP with all same content in multi subdomains

[Moderator Note: Topic title amended. Sorry but your problem is no more urgent than anyone else’s.]

Hello,

I want to add to many subdomains (ex: sub1.domain.com sub2.domain.com sub3.domain.com) but I want that all subdomains load the same content that is located to domain.com

An example is this site: teensdigest.com

You can add aff1.teensdigest.com aff2.teensdigest.com aff232.teensdigest.com so they all take the same content but the url stay with “aff1” above.

I added one subdomain into my cPanel but when I try to click on one post it goes into the main directory.

Ex: sub1.domain.com when i click “post” it goes domain.com/post and not sub1.domain.com/post

How can I do that into my WP site?

Thanks all

[Moderator Note: No bumping, thank you.]