title: How to create md5 hash in bash in Mac OS X
body: <p>How can you create an md5 hash for a string on a mac using <code>bash</code>?  <code>md5sum</code> does not exist in my environment. I did a <code>man</code> for md5 but I'm confused about what that really does.</p>
  
  <pre><code>md5 "string"
  </code></pre>
  
  <p>does not return a hash.</p>