code: public void onUnknownHost(String host, SshPublicKey pk) {
  		try {
  			System.out.println("The host " + host
  					+ " is currently unknown to the system");
  			System.out.println("The MD5 host key " + "(" + pk.getAlgorithm()
  					+ ") fingerprint is: " + pk.getFingerprint());
  			System.out.println("The SHA1 host key "
  					+ "("
  					+ pk.getAlgorithm()
  					+ ") fingerprint is: "
  					+ SshKeyFingerprint.getFingerprint(pk.getEncoded(),
  							SshKeyFingerprint.SHA1_FINGERPRINT));
  			try {
  				System.out.println("The SHA256 host key "
  						+ "("
  						+ pk.getAlgorithm()
  						+ ") fingerprint is: "
  						+ SshKeyFingerprint.getFingerprint(pk.getEncoded(),
  								SshKeyFingerprint.SHA256_FINGERPRINT));
  			} catch (Exception ex) {
  			}
  
  			getResponse(host, pk);
  		} catch (Exception e) {
  			e.printStackTrace();
  		}
  	}
docs: <p>
  Prompts the user through the console to verify the host key.
  </p>
  
  @param host
  the name of the host
  @param pk
  the public key supplied by the host
  
  @since 0.2.0