This directory contains all of the udev rules for the supported devices as retrieved from vendor websites and repositories. These are necessary for the devices to be reachable on linux environments.
20-hw1.rules(Ledger): https://github.com/LedgerHQ/udev-rules/blob/master/20-hw1.rules
Apply these rules by copying them to /etc/udev/rules.d/ and notifying udevadm.
Your user will need to be added to the plugdev group, which needs to be created if it does not already exist.
sudo cp udev/*.rules /etc/udev/rules.d/ && \
sudo udevadm trigger && \
sudo udevadm control --reload-rules && \
sudo groupadd plugdev && \
sudo usermod -aG plugdev `whoami`