Reboot server on no network

reboot-on-network-down.sh

#!/bin/bash

RETRIES=3
SLEEP=60
TEST_HOST="google.com"

if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 
   exit 1
fi

function testConnection() {
  /bin/ping -q -w1 -c1 $TEST_HOST &>/dev/null
  /bin/echo "$?"
}

function timeElapsed() {
  /bin/echo $(( SECONDS - START ))
}

function onFailed() {
  /bin/echo "Failed! Rebooting"
  /usr/bin/sudo /sbin/shutdown -r -t 1
  exit 1
}

START=$SECONDS
ONLINE=$(testConnection)
WAS_OFFLINE=0

while [ "$ONLINE" -ne 0 ]; do
  if [ "$RETRIES" -le 0 ]; then
    /bin/echo "Offline: failed after $(timeElapsed)s"
    onFailed
  else
    /bin/echo "Offline: waiting ${SLEEP}s to try again ($(timeElapsed)s, ${RETRIES}x)"
    WAS_OFFLINE=1
    (( RETRIES-- ))
    /bin/sleep $SLEEP
    ONLINE=$(testConnection)
  fi
done

if [ "$WAS_OFFLINE" -eq 1 ]; then
    /bin/echo "Online: connection came back after $(timeElapsed)s, ${RETRIES}x"
fi