Start multiple instance of Server edition


I just wonder how to start multiple instance in Linux environment? I have tried with following command but failed:

mono /usr/share/manager-server/ManagerServer.exe -port 8088


Manager Server [Version 17.4.89]
Copyright © 2017 NGSoftware. All rights reserved.

[4:56:58 AM] File not found: “/root/-port”

Just found the latest post of @lubos.
1+ question: where is the default location of data .manager file? I am using Ubuntu and followed installation script provided by Server edition guide.