I am a newcomer to linux, including this Pi 3. It works very well with fldigi 3.22. What's the best way to upgrade it to 3.23.05? I also have a laptop that I just installed ubuntu, and synaptic installed a 3.21 version of fldigi on it. My FT-100 runs perfectly on the Pi3 with 3.22, but the cat interface does not work at all on the laptop with 3.21. So the laptop REALLY needs a newer version. 73 Randy Houk KI6DGU