Remote NAS Shutdown

In the event of loss of power, I want to gracefully shutdown my NAS's, while my UPS still has battery capacity.

To accomplish this, I decided to use two Raspberry Pi Zero 2W's. One is not battery backed up. The 2nd Pi Zero is battery backed up. It runs a crontab script every 5 minutes that pings the upbacked up Pi. If there is no response from the pings. It waits one minute and issues another ping. If there is again no response, it shuts down my NAS's and other computers that are battery backed up.

I did have to install "sshpass" so I could put the password on the same line as ssh:

sudo apt install sshpass

However, can I just use ssh and the same proceedure that is in reference [2]? I am going to have to leave this for another day.

My script is:

!/bin/bash
count="0"
if ! (ping -c 1 -W 1 192.168.37.32 >/dev/null); then
  echo "$hostname_or_ip_address is dead"
  count=$[$count+1]
  sleep 60
  if ! (ping -c 1 -W 1 192.168.37.32 >/dev/null); then
     count=$[$count+1]
  fi
fi

echo "The value of count is $count"
if  (( $count==2 )); then
    echo "shuting down"

    # shutdown NAS's
    # the damn "$" in my password, again, cost me time 
    sshpass -p'1819$passord' ssh -o StrictHostKeyChecking=no 1819-username@192.168.xx.4 \
    'echo "1819\$password" | sudo -i -S shutdown -h now'

    # shutdown computers
    sshpass 31-password ssh -o StrictHostKeyChecking=no 31-username@192.168.xx.31 \
    'sudo shutdown -h now' 
fi

My cronjob script is:

*/5 * * * * /Full_Path_to_Script

Remote NAS Shutdown

References: