how to prevent duplicated content?

what do i put in my .htaccess so that it redirects from non-www to www

example

http://mysite.com/lala.htm to http://www.mysite.com/lala.htm
http://mysite.com/seo.htm to http://www.mysite.com/seo.htm

 

I could be wrong, so don't take my word for it, but why not a 301 redirect? Does that count as dupe content? If so, google is not really following the rules, it should see that as a permanent move, drop the old page and add the new.

I've just rewritten a tooon of pages to a new style, the old style is 301'd to the new style.. let you know how that goes.. lol.

 

try this

RewriteCond %{HTTP_HOST}   !^www\.mysite\.com [NC]
RewriteCond %{HTTP_HOST}   !^$
RewriteRule ^/(.*)         http://ww.mysite.com/$1 [L,R]

Code (markup):

 

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