This setup allows continuous pinging of an IP and then takes action based on the outcome. Tweak times to desired times, I like to start with low times and test/watch it work, then modify actions, then increase time once I'm happy it's working.
A result of 0 = Ping Response and 1 = Fail.
ping -c 1 -w 3 184.108.40.206; echo $?
This also uses CRON to run script @reboot.
cat << 'EOF' >/srv/ping_check.sh while :; do sleep 30 PING="" ping -c 1 -w 3 freesoftwareservers.com > /dev/null PING=$(echo $?) if [ $PING -ne 0 ]; then echo "No connection" else echo "Connected!" fi done EOF chmod +x /srv/ping_check.sh cat << 'EOF' >/etc/cron.d/ping_loop @reboot root /srv/ping_check.sh EOF chmod +x /etc/cron.d/ping_loop