Ubuntu 20
Install last software version
wget https://www.galil.com/sw/pub/ubuntu/20.04/gclib_1:2.2.1-1_amd64.deb \
https://www.galil.com/sw/pub/ubuntu/20.04/gcapsd_1:2.2.1-1_amd64.deb \
https://www.galil.com/sw/pub/ubuntu/20.04/gdk_1:2.2.1-1_amd64.deb
sudo dpkg -i ./gclib_1:2.2.1-1_amd64.deb \
./gcapsd_1:2.2.1-1_amd64.deb \
./gdk_1:2.2.1-1_amd64.deb
rm ./gclib_1:2.2.1-1_amd64.deb \
./gcapsd_1:2.2.1-1_amd64.deb \
./gdk_1:2.2.1-1_amd64.deb