Linux devfs
From wikinotes
devfs is a virtual filesystem that exposes devices, and device drivers as files.
You may also be interested in the alternative udev.
NOTE:
superceeded by udev
Tutorials
linux journal: devfs management/administration https://www.linuxjournal.com/article/6035
Locations
/etc/devfsd.conf
configure devfsd (which creates entries in /dev for devices/drivers)