I believe achieving this might be quite challenging, I mean, I have never tried to send Linux commands over Bluetooth and actually I think that would not be the correct approach for this. I believe the best option would be to do something like AP mode setup (IoT - Getting started with Access Point (AP) Mode for the Intel® Edison board | Intel® Developer Zone) but instead of using AP mode you would have to create a PAN and connect to your Edison through. I believe if you are able to achieve this you might be able to set a setup site in Edison's PAN IP. If you are interested in this approach I suggest you to read edison-config-server.js that can be found in /usr/lib/edison_config_tools/. That's the file that configures the setup webpage, for this approach it would be great to understand how it works.