title: How to regain control over an Ubuntu Remote Desktop running on a Google Cloud VM after being locked out?
body: <p>Following <a href="https://ubuntu.com/blog/launch-ubuntu-desktop-on-google-cloud" rel="nofollow noreferrer">these instructions</a> I set up a remote desktop computer running on a Google Cloud Virtual Machine. I had a perfectly functional <code>Ubuntu 20.04 LTS</code> machine controllable from my browser. I left it alone for a few minutes, and now the screen is locked:</p>
  <p><a href="https://i.stack.imgur.com/ttsyH.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ttsyH.png" alt="enter image description here" /></a></p>
  <p>I have not specified any password before. A simple enter does not let me in.</p>
  <p><strong>How can I regain control over this machine?</strong></p>