I have been told that I need to set up a 301 redirect from the "http://" version of my site to the "http://www" version. I know there are plenty of 301 redirect guides out there, but I want to make sure I'm doing it exactly right.
First question - is there any way for me to know if this has already been attempted, and if the redirect is valid?
Second question - if it hasn't been done, how do I do it? I understand the the correct method has something to do with my .htaccess file.