Hello sir When I run  /home/nic/root/bin/fred-client I receive at first: FredClient 2.1.2 Type "help", "license" or "credits" for more information. Using configuration from /home/nic/root/etc/fred/fred-client.conf ERROR: Can't connect to server SSL certificate file not found SSL private key file not found And when I copy the certificate in /root in /home/nic/root/etc/fred-client/ssl after  /home/nic/root/bin/fred-client I  receive : FredClient 2.1.2 Type "help", "license" or "credits" for more information. Using configuration from /home/nic/root/etc/fred/fred-client.conf Connecting to localhost, port 22351 ... ERROR: I cannot connect to the server localhost. Connection socket.error: (111, 'Connection refused') (localhost:22351) And when I type "http://localhost:22351/" in a browser it say : « localhost » a refusé la connexion. Les causes probables du problème sont     * un service n'est pas démarré ou     * le numéro de port 22351 est erroné.         What to do to solve this ?