Redirecting a domain name to a subdirectory of a different domain

[Shatner]

Wasn't sure where to ask this, apologies if it's in the wrong spot.

So I have a primary domain, let's call it primary.com.

I also have a secondary domain, let's call it secondary.com

I have these directories:

primary.com/one/
primary.com/two/
primary.com/three/

I would like to set up a redirect which makes the second one...

secondary.com/two/

Without affecting
primary.com/one/
primary.com/three/
primary.com

Is that possible? I can't quite wrap my head around out how to do it, but it seems like it should be doable.

Hopefully I explained that well enough.

[phranque]

what type of server is primary.com running on?

[Shatner]

Linux.

[phranque]

apache?

[Shatner]

Yes. Apache.

[phranque]

if you put this in the .htaccess file in your document root directory it will redirect exactly the subdirectory "/two/" to the "secondary.com" domain, but none of the contents of "two" will be redirected:
Options +FollowSymLinks
RewriteEngine on
RewriteRule ^two\/$ [secondary.com...] [R=301,L]

is that what you were looking for?

[g1smd]

Forward slashes never need escaping.

RewriteRule ^two/(.*) http://www.example.com/$1 [R=301,L]

[Shatner]

Close, but I actually do also want the contents of "two" to be redirected.

At the same time if someone types in
secondary.com/one/

I want it to redirect to
primary.com/one/

Including all the contents on all of those directories in this.

Again, apologies if I'm explaining this in a confusing way.