Random notes for the home server. ---- === Reading/debugging the varioius udev attributes: # udevadm info --name=/dev/sr0 --query=all --export USAGE ===== On older Ubuntu systems, it was possible to directly invoke udev_cb.py from the udev subsystem. However, version 16.04 switched to systemd which applies a time-limit to all udev activities. Given that copying media takes a while, systemd would kill the job midway. See the sibling directory 'ripserver' for a service that can accept job requests to perform the copy. In this way, the udev system will queue the copy (and quickly exit), and the ripserver will perform the lengthy operation.