Duplicate Content and htaccess

Hey,

I saw a thread about a couple of days ago about the topic (but I can't find it anymore), and it said that SE look www.domain.com and domain.com as different sites, and this could result in bad SERP results for duplicate content.

I also saw a reply saying that it could be fixed by modifying the htaccess file, and it showed how to. Could you tell me what to do, and how to do it? Thanks.

 

RewriteEngine on
RewriteCond %{HTTP_HOST} ^yourdomain\.com$ [NC]
RewriteRule ^(.*)$ http://www.yourdomain.com/$1 [R=301,L] 

Code (markup):

Change yourdomain.com to your proper domain name, make sure to leave all variables intact "/" "$1"

 

Ok, and do I add it anywhere?

 

.htaccess file is where the code goes.

 

Yeah, but I mean, do I add it anywhere within the .htaccess file?

 

Yes, thats fine as long as no other code is conflicting.