How do I use .htaccess in the root folder without affecting sub-domains?

Hi,

The solution might be quite simple, but I'm having trouble locating it. Can anyone direct me the right place?

I host six websites with separate domains from one server (one of which is a primary domain, hosted in the root folder)

Presently, any .htaccess 301 folder re-directs that I put in the in the root folder affect not only the primary domain, but all sub-domains as well.

How do I avoid this?
Thanks.

 

Have you hosted direct or using any panel

 

Thanks so much for your reply. That sounds really helpful. Could you enlarge--I'm assuming you mean code for the .htaccess file. Do you know where I can look this up?

Thanks

 

I've tried the following, but can't figure why it's not working
(I'm not sure of the right way to write this. I put myhostname for the domain name without the http and myhostnamewithhttpatthefront for the domain name with the http)

Code:

RewriteCond %{HTTP_HOST} myhostname$ [NC]
RewriteRule /gallery.html myhostnamewithhttpatthefront/gallery.php [r=301,nc]

 

OK, cool, thanks for your replies (I quickly get over my head on this one )

 

OK, I've got it running, using the following code:
(I didn't realise the backslashes were necessary for the periods), and that I should not begin the rewriterole with a forward slash)

RewriteCond %{HTTP_HOST} my\.go4expert\.com$ [NC]
RewriteRule ^gallery.html$ newurl [r=301,nc]