How to redirect from www site to non-www site by .htaccess

To set a redirection from www site to non-www site, use the following code in .htaccess file for the domain.

# mod_rewrite in use
Options +FollowSymLinks
RewriteEngine on
RewriteCond %{HTTP_HOST} .
RewriteCond %{HTTP_HOST} !^domain.com
RewriteRule (.*) http://domain.com/$1 [R=301, L]