sudo apt install libpam-u2f pamu2fcfg
sudo mkdir -p /etc/u2f-mappings
sudo cp ~/.config/Yubico/u2f_keys /etc/u2f-mappings/u2f_keys
curl -fsSL https://raw.githubusercontent.com/Yubico/libu2f-host/master/70-u2f.rules | sudo tee /etc/udev/rules.d/70-u2f.rules >/dev/null
sudo udevadm control --reload-rules
sudo udevadm trigger
pamu2fcfg -u jt | sudo tee /etc/u2f-mappings/u2f_keys >/dev/null
sudo chown root:root /etc/u2f-mappings/u2f_keys
sudo chmod 600 /etc/u2f-mappings/u2f_keys
configure pam
auth sufficient pam_u2f.so authfile=/etc/u2f-mappings/u2f_keys cue pinverification=1