Create data_transfer.sh

# This script monitors and output data transfer of each shadowsocks port.
#!!!!!!!!!!WARNING WARNING!!! THIS SCRIPT WILL CLEAN UP ALL YOUR IPTABLES CHAINS AND RULES!!! ONLY USE THIS SCRIPT ON A CLEAN IPTABLES
#add to crontab and you may also edit the script to update data transfer results to my sql.
# Will receive bunch of errors on the first run. Ignore them.