Capistrano

Capistrano: Automating Application Deployment

A utility for executing commands in parallel on multiple machines, such as deploying applications to a cluster of boxes.

Functions

Great for automating tasks via SSH on remote servers, like software installation, application deployment, configuration management, ad hoc server monitoring, and more.
Ideal for system administrators, whether professional or incidental.
Easy to customize. Its configuration files use the Ruby programming language syntax, but you don't need to know Ruby to do most things with Capistrano.
Easy to extend. Capistrano is written in the Ruby programming language, and may be extended easily by writing additional Ruby modules.