title: What is PATH on a Mac (UNIX) system?
body: <p>I'm trying to setup a project, storm from git:<br>
  <a href="https://github.com/nathanmarz/storm/wiki/Setting-up-development-environment" rel="nofollow noreferrer">https://github.com/nathanmarz/storm/wiki/Setting-up-development-environment</a></p>
  
  <blockquote>
    <p>Download a Storm release , unpack it, and put the unpacked bin/ directory on your PATH</p>
  </blockquote>
  
  <p>My question is: What does PATH mean? What exactly do they want me to do?</p>
  
  <p>Sometimes I see some /bin/path, $PATH, or echo PATH.</p>
  
  <p>Can someone explain the concept of PATH, so I can setup everything easily in the future without just blindly following the instructions?</p>