#!/bin/bash
UP=$(service mysql status|awk '{ print $1}');
if [ "$UP" != 'SUCCESS!' ];
then
        echo "MySQL is down.";
        sudo service mysql start

else
        echo "All is well.";
fi

*/3 * * * * /home/user/scripts/monitor.sh > /dev/null 2>&1

* * * * * systemctl is-active --quiet mysql || systemctl restart mysql