title: How to skip already existing files when downloading with curl?
body: <p>I want to <code>curl</code> to download a link, but I want it to skip files that already exist. Right now, the line of code I have will continue to overwrite it no mater what:</p>
  
  <pre><code>curl '$url' -o /home/$outputfile &amp;&gt;/dev/null &amp;
  </code></pre>
  
  <p>How this can be achieved?</p>