Htaccess is a powerful tool. Simplest mistake in syntax can cause problems. In this post i am talking about the permanent redirect, ie 301 redirect of old domain to new domain.
Case 1: if you need to keep the url structure of old domain in the new one
eg: http://olddomain.com/hello gets redirected to http://newdomain.com/hello
Do this: if you plan to keep the url structure
+ve: Helps to retain the seo
Redirect 301 / http://newdomain.com/
Case 2: if you don’t need the url structure
eg: http://olddomain.com/hello gets redirected to http://newdomain
Do this: if you dont plan to keep the url structure
RewriteEngine On
RewriteRule ^(.*)$ http://newdomain.com/ [R=301]
Enjoy smile