Permission denied inside Docker container : <p>I have a started container <code>gigantic_booth</code> and I want to create the directory <code>/etc/test</code>:</p>

<pre><code># docker exec -it gigantic_booth /bin/bash
$ mkdir /etc/test
$ mkdir: cannot create directory '/etc/test': Permission denied
</code></pre>

<p>And <code>sudo</code> command is not found. I don't want to create this directory in image-build-time but once is started.</p>

<p>How can I do?</p>

<p>Thanks :)</p>
