title: ssh: The authenticity of host 'hostname' can't be established
body: <p>When i ssh to a machine, sometime i get this error warning and it prompts to say "yes" or "no". This cause some trouble when running from scripts that automatically ssh to other machines.</p>
  
  <p>Warning Message: </p>
  
  <pre><code>The authenticity of host '&lt;host&gt;' can't be established.
  ECDSA key fingerprint is    SHA256:TER0dEslggzS/BROmiE/s70WqcYy6bk52fs+MLTIptM.
  Are you sure you want to continue connecting (yes/no)? yes
  Warning: Permanently added 'pc' (ECDSA) to the list of known hosts.
  </code></pre>
  
  <p>Is there a way to automatically say "yes" or ignore this?</p>