How do I redirect to www using .htaccess?

Create a .htaccess file with the following:

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

Replace domain.com with your actual domain. This works only on Linux servers with mod_rewrite enabled.

Looking forward to hearing from you.