title: Google Cloud VM when sudoing asks for password
body: <p>I've been working with a Google Cloud debian VM and had no problem at all doing super user tasks using sudo (sudo was not asking for password). </p>
  
  <p>Today I connected via SSH as usual and when I try to <strong><em>sudo something</em></strong> it started asking for password: </p>
  
  <pre><code>We trust you have received the usual lecture from the local System
  Administrator. It usually boils down to these three things:
  
      #1) Respect the privacy of others.
      #2) Think before you type.
      #3) With great power comes great responsibility.
  
  [sudo] password for -----:
  </code></pre>
  
  <p>According to the documentation it should not ask for password as is already SSL Key authenticated connection. </p>