title: What does the $ mean when running commands?
body: <p>I've been learning Python, and I keep running into the $ character in online documentation. Usually it goes something like this:</p>
  
  <p><code>$ python ez_setup.py</code> (Yeah, I've been trying to install setup tools)</p>
  
  <p>I'm fairly certain that this command isn't for the python IDE or console, but I've tried windows cmd and it doesn't work. Any help?</p>