I need to change the Permalink structure of my wordpress website...
FROM: "/%post_id%-%postname%.html" (example: http://example.com/13659-sample-post.html)
TO: "/%year%/%monthnum%/%day%/%postname%/" (example: http://example.com/2011/05/28/sample-post/)
But the problem is, once it's changed, all the old links indexed on Google, linked by others etc become useless and throw 404 errors.
NO PLUGINS PLEASE. Is there a way to redirect old permalink urls ("/%post_id%-%postname%.html") to ("/%year%/%monthnum%/%day%/%postname%/") using .htaccess??
Hope you can help me on this one.