sudo dpkg -i freedomotic_5.5.1.deb
or use your preferred packages manager. The installation could require some missing dependencies. In this case digit
sudo apt-get install -f
You can now call Freedomotic with SUDO (no problem, it automatically runs as “freedomotic” user) but your Linux user won’t be able to access config files unless it belongs to group “freedomotic”, so the best choice is to issue a
sudo adduser <your-username> freedomotic
exit and re-login. You no longer need to SUDO when calling Freedomotic.
or click on the Application Menu item.