udev

commands

# monitor changes (optional)
udevadm monitor

# get device info (optional)
udevadm info -a -p $(udevadm info -q path -n /dev/sdb1)

# usb info
sudo lsusb -v

# device info
udevadm info --query=all --name=/dev/sdc1

udevadm control --reload-rules && udevadm trigger

udevadm control --reload-rules; udevadm trigger --attr-match=subsystem=block -v

udevadm control --reload-rules

udevadm trigger --attr-match=subsystem=net

Automatically move photos from memory card to hard drive with udev

Create udev rule

cat < /etc/udev/rules.d/70-persistent-dcim.rules
KERNEL=="sd*1",SUBSYSTEM=="block",ATTR{partition}=="1",ACTION=="add",RUN+="/usr/sbin/mvdcim.sh \$KERNEL"
EOF

Create mvdcim.sh script

cat < /usr/sbin/mvdcim.sh  
#!/bin/bash

DEVICE=/dev/\${1}
SOURCE=/mnt/DCIM/100NIKON
TARGET=/home/hafr/dcim

mount \${DEVICE} /mnt
if [ -d \${SOURCE} ]; then
        mv \${SOURCE}/*.jpg \${TARGET}         
        chmod 666 \${TARGET}/*.jpg
        eject \${DEVICE}
else
        umount /mnt
fi
EOF
chmod +x /usr/sbin/mvdcim.sh

udev
http://www.panticz.de/udev

Links
http://wiki.ubuntuusers.de/UDEV

udev