These are two scripts that enable you to remote control a PC using Dropbox

dropbox_client.sh

#!/bin/bash
touch input.txt
touch output.txt

echo -n "Enter Command: "
read INCOM

echo "$INCOM" > input.txt

while [ -f input.txt ];do
	sleep 10
done

cat output.txt

dropbox_server.sh

#!/bin/bash 
while true; do 
	if [ -f  input.txt ];then
		OUTCOM=$(cat input.txt)
		$OUTCOM > output.txt
		rm input.txt > /dev/null 2>&1
		else
			sleep 10
	fi
done