I'm using Debian. When reading
man lsblk I see mention of a udev db:
The lsblk command reads the sysfs filesystem and udev db to gather information. If the udev db is not available or lsblk is compiled without udev support than it tries to read LABELs, UUIDs and filesystem types from the block device. In this case root permissions are necessary.
I can further find numerous mentions of "database" in
man udev. It seems my
udev is run under
systemd-udevd. But I don't see an ability to configure the database location in the man locations, and I don't see it specified in
/lib/systemd/system/udev.service. Where is the database stored?