Rails application on shared hosting?

Is there a way that I can deploy my locally made rails app on a shared host that has Ruby installed?

Which server is best for Ruby on Rails?

Phusion Passenger: Fast web server & app server Passenger today has become the recommended server for Ruby on Rails applications.

Which server is used by Rails?

The Ruby standard library comes with a default web server named WEBrick. As this library is installed on every machine that has Ruby, most frameworks such as Rails and Rack use WEBrick as a default development web server.

Capistrano to deploy and (Mongrel or Passenger... preferably the latter... or if you HAVE to, FastCGI although FastCGI is pretty slow with Rails) to serve.

If you have a shared host you'll have to vendor your Rails version and all your gems, as you probably won't have access to install gems. Even if you did, you won't want Rails picking old versions of things.