sudo /etc/init.d/proftpd start
 * Starting ftp server proftpd                                                   - IPv4 getaddrinfo 'media-server' error: Name or service not known
 - warning: unable to determine IP address of 'media-server'
 - error: no valid servers configured
 - Fatal: error processing configuration file '/etc/proftpd/proftpd.conf'
                                                                         [fail]