====== UDEV: Userspace DevFS ======

===== Information Gathering =====
To get information about what udev is doing, use:
  udevmonitor
for even more information, the '-v' flag is useful:
  udevmonitor -v

===== Samples Of Custom Rules =====

==== changing permissions of device files ====
This sets the permissions of the file /dev/nvram to 0660:
  KERNEL=="nvram", NAME="%k", GROUP="nvram", MODE="0660"

==== renaming network interfaces ====
I found two methods, this is my own one:
  ACTION=="add", BUS=="pci", DRIVERS=="3c59x", NAME:="3com%n"
another one, found in Gentoo Linux:
  SUBSYSTEM=="net", DRIVERS=="?*", ATTRS{address}=="00:0a:e4:2e:c5:26", NAME="e1000"

==== Running Scripts ====
These two start/stop chipcardd2 according to reader insertion/removal:
  ACTION=="add", SUBSYSTEM=="usb", ENV{PRODUCT}=="c4b/300/100", RUN="/etc/init.d/chipcardd2 --quiet start"
  ACTION=="remove", SUBSYSTEM=="usb", ENV{PRODUCT}=="c4b/300/100", RUN="/etc/init.d/chipcardd2 --quiet stop"