Focusrite Forte is a professional 2-in, 4-out portable USB audio interface, designed to deliver analogue sources to your DAW. It features two remote-controlled mic preamps.
At this point in time the Forte' is not considered compatible with Linux, according to Focusrite.
"This applies to All Focusrite Products None of our products are supported for use on Linux. The Scarlett range and iTrack Solo are Class Compliant USB Devices, and may work in a Linux-based setup that support this class of device, but we do not offer support for doing this and cannot verify the performance you may experience." Focusrite Support Website