Here are some HOW-TOs for various topics about Ruby on Rails:

• Rails HOW-TO: Installing Rails on Debian
• Rails HOW-TO: Installing Rails on Windows
• Rails HOW-TO: A simple Rails apps:phones
• Rails HOW-TO: Other aspects of customistation
• Rails HOW-TO: A more involved Rails apps:jabs
• Rails HOW-TO: Apache and Basic Authentication
• Rails HOW-TO: Using REST
• Rails HOW-TO: Authenticating with WebAuth

Here are some other links:

• A file containing the commands used in the above documents
• The main page about Ruby on Rails