Modify dfu-util For Ubuntu 14.04

#Inside your home directory, download dfu-util

git clone git://git.openezx.org/dfu-util.git

open dfu-util/src/dfu_load.c

add this instruction "milli_sleep(200);" under line 134

cd dfu-util

./autogen.sh

./configure

make

The resulting binary is dfu-util/src/dfu-util.