URL redirect/rewrite using the .htaccess file

How do I redirect all links for www.example.com to example.com ?

Create a 301 redirect forcing all http requests to use either www.example.com or example.com:

• Example 1 - Redirect example.com to www.example.com:

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

• Example 2 - Redirect www.example.com to example.com:

    RewriteEngine on
    RewriteCond %{HTTP_HOST} ^www\. example\.com$
    RewriteRule ^/?$ "http\:\/\/example\.com\/" [R=301,L]