title: cannot quit jupyter notebook server running
body: <p>I am using Jupyter Notebook for a project. Since I ssh into a linux cluster at work I use</p>
  
  <pre><code>ssh -Y -L 8000:localhost:8888 user@host
  </code></pre>
  
  <p>Then I start the notebook with <code>jupyter notebook --no-browser &amp;</code> so that I can continue using the terminal. Then on my local machine I open to <code>localhost:8000</code> and go about my work.</p>
  
  <p>My problem is that I forgot several times to close the server by foregrounding the process and killing it with <code>Ctrl-C</code>. Instead I just logged out of the ssh session. Now when I run <code>jupyter notebook list</code> I get</p>
  
  <pre><code>Currently running servers:
  http://localhost:8934/ :: /export/home/jbalsells
  http://localhost:8870/ :: /export/home/jbalsells
  http://localhost:8892/ :: /export/home/jbalsells
  http://localhost:8891/ :: /export/home/jbalsells
  http://localhost:8890/ :: /export/home/jbalsells
  http://localhost:8889/ :: /export/home/jbalsells
  http://localhost:8888/ :: /export/home/jbalsells
  </code></pre>
  
  <p>I obviously do not want all of these servers running on my work's machine, but I do not know how to close them!</p>
  
  <p>When I run ps I get nothing:</p>
  
  <pre><code>  PID TTY          TIME CMD
  12678 pts/13   00:00:00 bash
  22584 pts/13   00:00:00 ps
  </code></pre>
  
  <p>I have Jupyter 4.1.0 installed.</p>