Sitewide 301 Redirect

I have just completed a website remodel. The website will be hosted on the same domain, however the page names are going to change. For example www.example.com/one_two.html will be changed to www.example.com/one_dos.html. I intend on using a 301 redirect in order to not lose SEO ranking. I was can anyone tell me how to do this for the entire si开发者_如何学编程te?

Create a relation between old and new URL and then create regular expression based on them. Then add the redirection code in the .htaccess file..

This link may help you http://webtips.in/301-redirect-using-htaccess