Install iftop on Firewalla

install_iftop.sh

#!/bin/bash 

# v2.0
# https://gist.github.com/mbierman/dd9fd1b89220af98dea74b2ab95a9f15 
# Put this script in ~/.firewalla/config/post_main.d in order to resinstall after upgrades

log=/data/fw_reboot.txt
if ! [ -w $log ] ; then
        sudo touch $log
        sudo chmod a+w $log
fi
app=iftop
edate=$(date +'%a %b %d %H:%M:%S %Z %Y')

command_exists () {
    command -v $1 >/dev/null 2>&1;
}

if command_exists $app; then
	echo -e "\n\n$app instaleld!\n bye"
	exit
else
	echo "$app could not be found"
	echo "installing..."
	export DEBIAN_FRONTEND=noninteractive

	unalias apt
	unalias apt-get
	sudo apt-get update -yq
	sudo apt-get install -yq $app
	echo -e "$edate $app instaleld!" | tee -a $log
fi