force non www htaccess redirect code example

Example 1: redirect htaccess non www to www

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

Example 2: redirect htaccess 301

Redirect 301 /pagename.php http://www.domain.com/pagename.html