title: What does "|&" mean in Bash?
body: <p>For example</p>
  <pre><code>echo &quot;aaa&quot; |&amp; cat
  </code></pre>
  <p>What does <code>|&amp;</code> mean here?</p>
  <p>Is there a website recommended to look up those? Since most search engines can't support searching special characters.</p>