title: What if the Docker installed image does not have a shutdown command?
body: <p>The official image <code>ubuntu18.04</code> of the installed <code>Docker</code></p>
  <pre><code>PS C:\Users\17293&gt; docker images
  REPOSITORY   TAG       IMAGE ID       CREATED       SIZE
  ubuntu       18.04     4eb8f7c43909   2 weeks ago   63.1MB
  PS C:\Users\17293&gt; docker ps -a
  CONTAINER ID   IMAGE          COMMAND   CREATED       STATUS       PORTS     NAMES
  12910e0535ad   ubuntu:18.04   &quot;bash&quot;    2 hours ago   Up 2 hours             mineos
  </code></pre>
  <p>I tried <code>poweroff</code>, <code>shutdown</code> and <code>halt</code>, but how can I <code>shutdown</code>?</p>
  <pre class="lang-sh prettyprint-override"><code>root@12910e0535ad:/# uname -a
  Linux 12910e0535ad 5.4.72-microsoft-standard-WSL2 #1 SMP Wed Oct 28 23:40:43 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
  root@12910e0535ad:/# poweroff
  bash: poweroff: command not found
  root@12910e0535ad:/# shutdown
  bash: shutdown: command not found
  root@12910e0535ad:/# halt
  bash: halt: command not found
  root@12910e0535ad:/#
  </code></pre>