systemd/udev.rules

# There are a number of modifiers that are allowed to be used in the NAME or PROGRAM fields.
# They provide the following subsitutions:
# %n - the "kernel number" of the device.
#      for example, 'sda3' has a "kernel number" of '3'
# %M - the kernel major number for the device
# %m - the kernel minor number for the device
# %b - the bus id for the device
# %c - the return value for the CALLOUT program (note, this doesn't work within
#      the PROGRAM field for the obvious reason.)
# %D - use the devfs style disk name for this device.
#      For partitions, this will result in 'part%n'
#      If this is not a partition, it will result in 'disk'
#

# Looking for scsi bus id 42:0:0:1
CALLOUT, BUS="scsi", PROGRAM="/bin/echo -n test-%b", ID="test-42:0:0:1", NAME="%c"

# A usb camera.
LABEL, BUS="usb", vendor="FUJIFILM", NAME="camera%n"

# USB Epson printer to be called lp_epson
LABEL, BUS="usb", serial="HXOLL0012202323480", NAME="lp_epson"

# USB HP printer to be called lp_hp
LABEL, BUS="usb", serial="W09090207101241330", NAME="lp_hp"

# sound card with PCI bus id 00:0b.0 to be the first sound card
NUMBER, BUS="pci", id="00:0b.0", NAME="dsp"

# sound card with PCI bus id 00:07.1 to be the second sound card
NUMBER, BUS="pci", id="00:07.1", NAME="dsp1" 

# USB mouse plugged into the third port of the first hub to be called mouse0
TOPOLOGY, BUS="usb", place="1.3", NAME="mouse0"

# USB tablet plugged into the third port of the second hub to be called mouse1
TOPOLOGY, BUS="usb", place="2.3", NAME="mouse1"
TOPOLOGY, BUS="usb", place="2.4", NAME="mouse2"

# ttyUSB1 should always be called visor
REPLACE, KERNEL="ttyUSB1", NAME="visor"
REPLACE, KERNEL="ttyUSB0", NAME="pl2303"

# a devfs like way to name some tty devices
#REPLACE, KERNEL="ttyS*", NAME="tts/%n"
#REPLACE, KERNEL="tty*", NAME="vc/%n"