title: Can't connect to Jenkins Slave No Known Hosts file was found at /var/jenkins_home/.ssh/known_hosts
body: <p>Here are my jenkins config:<a href="https://i.stack.imgur.com/FKoTT.png" rel="noreferrer"><img src="https://i.stack.imgur.com/FKoTT.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/a9zI9.png" rel="noreferrer"><img src="https://i.stack.imgur.com/a9zI9.png" alt="enter image description here"></a></p>
  
  <p>Error message:</p>
  
  <pre><code>/var/jenkins_home/.ssh/known_hosts [SSH] No Known Hosts file was found at /var/jenkins_home/.ssh/known_hosts. Please ensure one is created at this path and that Jenkins can read it.
  </code></pre>
  
  <p>No matter how much I tried it doesn't work. I've read <a href="https://issues.jenkins-ci.org/browse/JENKINS-42959" rel="noreferrer">this post</a>, but still no solution.</p>