title: Can I symlink multiple directories into one?
body: <p>I have a feeling that I already know the answer to this one, but I thought I'd check.</p>
  
  <p>I have a number of different folders:</p>
  
  <pre><code>images_a/
  images_b/
  images_c/
  </code></pre>
  
  <p>Can I create some sort of symlink such that this new directory has the contents of all those directories? That is this new "<code>images_all</code>" would contain all the files in <code>images_a</code>, <code>images_b</code> and <code>images_c</code>?</p>