title: Address already in use but nothing in netstat or lsof
body: <p>I try to start the Python SimpleHTTPServer on port 7054 :</p>
  
  <pre><code>$ sudo python -m SimpleHTTPServer 7054
  ...
  socket.error: [Errno 98] Address already in use
  </code></pre>
  
  <p>So, I ran the following commands :</p>
  
  <pre><code>$ sudo netstat -ntpu | grep 7054
  $ sudo lsof -i -n -P | grep 7054
  </code></pre>
  
  <p>But I have no results.</p>