To deploy Ruby on Rails framework to your domain folder:
1. Login into secure shell via SSH protocols.
2. Browse to the folder that you wish to have the rails installed and run the following commands:
rails <rail_name>; where <rail_name> is any name you wish to have.
3. If the application is created under the www folder, just browse to http://domainname/<anyname>/public .
To have a secure rails create the rails framework outside www folder and then create a symbolic link in the www folder to refer to the framework's public folder.
You may refer to the following URL for further references: