title: what does setting PATH do on OSx?
body: <p>I'm trying to install mysql with django on my mac and a tutorial is saying i have to:</p>
  
  <pre><code>Add /usr/local/mysql/bin/ to PATH
  export PATH=/usr/local/mysql/bin/:$PATH
  (from my ~/.bashrc)
  </code></pre>
  
  <p>I know setting paths help find executables, but i know you can set multiple paths in your bash profile.  how does this work?</p>