Script to open a reverse ssh tunnel if a specific file exists on a server with 'yes' in it

manage_remote

#!/bin/bash

WGET="/usr/bin/wget"
$WGET -q --tries=10 --timeout=5 http://youralwaysonserver/openpi.php -O /tmp/openpi &> /dev/null
if grep -Fxq "yes" /tmp/openpi
then
ssh -gNnT -R *:55555:raspberrypi.local:80 piremoteuser@youralwaysonserver &
PID=$!
echo "Opened"
sleep 360s;
kill $PID
echo "Closed"
else
echo "no"
fi