title: understanding what Docker stdin and stdout mean
body: <p>I was just going through <code>Docker run</code> documentation and came across the following command:</p>
  <pre><code>docker run -a stdin -a stdout -i -t ubuntu /bin/bash
  </code></pre>
  <p>The documentation can be found <strong><a href="https://docs.docker.com/engine/reference/run/" rel="nofollow noreferrer">HERE</a></strong>.</p>
  <p>can somebody tell me, is the <code>stdin</code> and <code>stdout</code> stand for ?</p>
  <p>I found this thread <strong><a href="https://stackoverflow.com/questions/28460426/stdin-and-stdout">HERE</a></strong>, but its related to python , can anybody explain this to me in the context of Docker and ofcourse ubuntu ?</p>
  <p>Thank you.</p>