HTACCESS: Always Redirect Page/URL-Path to other Page

Question: As part of restructuring my website I have renamed some pages. Because there are still existing some of my old URLs somewhere on the Internet, I would like to include an automatic redirect in my .htaccess file that redirects, for example, all requests to the URL "example.com/oldpage" to the URL "example.com/newpage" instead.

Answer: This is possible with the following lines in the .htaccess file:

RewriteEngine On
RewriteRule ^oldpage http://www.example.com/newpage [R=301,L]

Whenever someone is typing "example.com/oldpage" in his browser, with this redirection, automatically the page "example.com/newpage" is displayed. At the same time the requesting browser is notified with the HTTP status code 301 (Moved Permanently). With this, for instance the Google Bot knows, that you can find the corresponding site under the new URL in future.