title: PuTTy "unknown option -o" when trying to connect
body: <p>following the <a href="https://cloud.google.com/datalab/docs/quickstarts" rel="nofollow noreferrer">getting started guide</a> I attempt to create &amp; connect to a datalab vm instance with the command:</p>
  
  <pre><code>datalab create demo
  </code></pre>
  
  <p>but I get the following pop-up:</p>
  
  <p><a href="https://i.stack.imgur.com/g4V8b.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/g4V8b.png" alt="err message"></a></p>
  
  <p>then, on ok-ing the error, </p>
  
  <pre><code>connection broken
  Attempting to reconnect...
  </code></pre>
  
  <p>in the command prompt</p>
  
  <p>Any idea how to have the keys generated a different way to allow me to connect?</p>