Remove www from URL using mod_rewrite

You may choose not to have www alias for your domain, so that www.domain.com will redirect to
domain.com, use mod_rewrite and .htaccess to achieve this. (This may be useful if for example
you have a really long domain name)

Put the following into your .htaccess

RewriteEngine on
rewritecond %{http_host} ^www\.domain\.com [nc]
rewriterule ^(.*)$ http://domain.com/$1 [r=301,nc]