The ServerGrove blog, a hosting provider whose services include shared hosting, has posted a guide to help you deploy to shared hosting with Capifony, a Symfony-based tool for use with Capistrano.

This article is meant to help you configure and deploy your projects developed with Symfony2 into a Shared Hosting environment, so if you need to deploy using capifony on a VPS, please read this article.

You'll need ssh access to the server to get things set up for the deployment as well as a local environment where you can install Ruby and Ruby Gems (their platform for the example is OSX). They help you get those installed and generate a key for use with the deployment. Once this key is copied over to the remote system, you can then set up the config to use the password-less connection and to deploy from either a local repository or a remote location (like github).