I tried this. I could not log on. I get these errors using filezilla

Status: Resolving address of mydomain.com
Status: Connecting to my_IP_address....
Status: Connection attempt failed with "ECONNREFUSED - Connection refused by server".
Error: Could not connect to server
Status: Waiting to retry...
Could you point to an exact URL where we can be enlightened by the adduser command. This click me is useradd.