Currently, the Fitbit OS simulator only supports Windows and macOS hosts. There are certainly developers out there who use Linux as their primary (or even only) development OS. It shouldn't be too difficult to maintain Linux port of the simulator since it is built using the cross-platform Electron framework, which officially supports Linux.
I successfully installed and ran Windows variant of the simulator using the Wine (version 3.0 on Ubuntu 16.04 LTS), and it properly connects with the Fitbit Studio. Applications run with no problems. The only thing that currently does not work is switching the device type from Ionic (default) to Versa. Doing so will always crash the simulator. If the simulator properly ran under Linux, it would be kind-of solution for developing Fitbit OS apps from Linux. The real port of the simulator would be even better, though.
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