Apache - Mod_Rewrite All Files (Temporarily) To One File

For example, say you want to put up a coming soon page on a Drupal site and you don't want to edit the "Down for Maintenance" file, you can just quickly alter the .htaccess file.

This example involved a Drupal site where I had FTP access, but not admin access to the installation. So, the quickest option was to whip up a coming soon page, upload the file as index.html and then put up a new .htaccess file (backing up the original).

The .htaccess file should look like this:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule !^/index.html$  /index.html [R=302]

</IfModule>