copy: If you desktop is Linux, you can use the `scp` command line
tool. If your desktop PC is windows, please use a scp client like
WinSCP (see http://winscp.net/).
+
+
+Change Certificate for Cluster Setups
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+If you change the API certificate of an active cluster node, you also
+need to update the fingerprint inside the cluster configuration file
+`cluster.conf`. It is best to edit that file on the master node.
+
+To show the actual fingerprint use:
+
+----
+openssl x509 -in /etc/pmg/pmg-api.pem -noout -fingerprint -sha256
+----