title: SSH "Failed to add the host to the list of known hosts" Openshift
body: <p>I tried to use <code>ssh</code> command to connect to another remote host.</p>
  
  <pre><code>ssh -p 21098 -i $OPENSHIFT_DATA_DIR/.ssh/host_key user@domain.com   
  
  The authenticity of host '[domain.com]:21098 ([124.219.148.93]:21098)' can't be established.
  RSA key fingerprint is 12:15:79:55:c6:2a:66:1e:82:94:da:19:e1:ca:21:3d.
  
  Are you sure you want to continue connecting (yes/no)?yes
  Failed to add the host to the list of known hosts (/var/lib/openshift/541b685c5973cae7bbf006f4/.ssh/known_hosts).
  
  Connection closed by 124.219.148.93
  </code></pre>
  
  <p>I suppose we do not have access to <code>home/.ssh</code>. So how to solve this problem?</p>