title: What's the difference between GEM_HOME and GEM_PATH?
body: <p>RubyGems is a package manager for the Ruby programming language that provides a standard format for distributing Ruby programs and libraries (in a self-contained format called a "gem"), a tool designed to easily manage the installation of gems, and a server for distributing them. It is analogous to EasyInstall for the Python programming language. RubyGems is now part of the standard library from Ruby version 1.9.</p>
  
  <p>That said, what's the difference between GEM_HOME and GEM_PATH?</p>