rkdeveloptool gives you a simple way to read/write rockusb device.let's start.

compile and install
1 install libusb and libudev
	sudo apt-get install libudev-dev libusb-1.0-0-dev dh-autoreconf
2 go into root of rkdeveloptool
3 autoreconf -i
4 ./configure
5 make

rkdeveloptool usage,input "rkdeveloptool -h" to see

example:
1.download kernel.img
sudo ./rkdeveloptool db RKXXLoader.bin    //download usbplug to device
sudo ./rkdeveloptool wl 0x8000 kernel.img //0x8000 is base of kernel partition,unit is sector.
sudo ./rkdeveloptool rd                   //reset device

compile error help
if you encounter the error like below:
./configure: line 4269: syntax error near unexpected token `LIBUSB1,libusb-1.0'
./configure: line 4269: `PKG_CHECK_MODULES(LIBUSB1,libusb-1.0)'

You should install pkg-config libusb-1.0:
	sudo apt-get install pkg-config libusb-1.0