Re : Does Sentinel EMS Service support Linux-based in the future?

As of now EMS can be installed on Windows only.

For using it on command line, you can make your own set of tools or applications on Linux by using EMS Web Services.

In that case you can have EMS installed on a Windows machine but all your operations can be performed on Linux machine with your own tools. These tools will communicate to EMS using Web Services so both machines should be connected to same network.

Please confirm if you are using Sentinel EMS 4.x or EMS 7.x from Sentinel LDK. 

I can share you the documentation link accordingly.

Regards,
Ashish