title: Bash - Hex to String
body: <p>In bash, how can I convert an hex-encoded string like this:</p>
  
  <pre><code>2e2f65202d6b2022616622
  </code></pre>
  
  <p>or</p>
  
  <pre><code>\x2e\x2f\x65\x20\x2d\x6b\x20\x22\x61\x66\x22
  </code></pre>
  
  <p>(or something similiar) to:</p>
  
  <pre><code>./e -k "af"
  </code></pre>
  
  <p>... and then execute it?</p>
  
  <p>Thanks!</p>