Q. Can I install Linux Operating systems on my Fitlet2?

Yes. In order to Install Linux Operating Systems, you need to reconfigure the BIOS:

In Chipset > South Bridge > OS Selection. Select Linux.

Q. Which Linux Operating System is Compatible with Fitlet2?

Old Kernels do not operate very well on fitlet2, many issues are solve updating to a more up to date kernels supporting newer HW.

Ubuntu 17.10 with 4.13 Kernel is fully compatible. https://www.ubuntu.com/download/desktop

Mint 18.3 "Sylvia" - Cinnamon with 4.10 Kernel version is fully compatible.

Q. Which Licence of Windows 10 Enterprise LTSB will be compatible with Fitlet2?

The licence for Apollo Lake CPU is Entry.