How to create a 301 redirect?
As described on URL Canonicalization article we published in March, having a unique URL for each webpage is important in improving your "Pagerank". Canonicalization is accomplished by redirecting non-standard web pages to a preferred ("standard") webpage. There are a number of ways to redirect a webpage, but 301 (HTTP/1.1 Status Code, "Moved Permanently") redirect is the search engine-friendly method that passes the PageRank and search engine ranking status from the old to a new page. Here is an example of how 301 redirects can be implemented in a LAMP (Linux/Apache/Mysql/PHP) environment.