title: Ambari Server Cannot Add New Host
body: <p>I am trying to get Ambari working between 2 hardware machines running the Hortonworks HDP 2.3 sandbox. </p>
  
  <p>Both machines can successfully ssh into each other from the terminal without passwords. I am trying to add a new data node (server1.hortonworks.com) to Ambari on the main computer(sandbox.hortonworks.com). I can only assume that the fqdn I am using is correct since everything is working from the terminal. I can successfully</p>
  
  <pre><code>ssh server1
  </code></pre>
  
  <p>When adding the fqdn of server 1 to the main computer along with the private rsa key and then proceeding, it fails and says: </p>
  
  <blockquote>
    <p>Host checks were skipped on 1 hosts that failed to register.</p>
  </blockquote>
  
  <p>I really do not know where to go from here to get the other host added correctly.</p>
  
  <p><img src="https://i.stack.imgur.com/ensZy.jpg" alt="Screenshot"></p>