This script is to check if a service is running. If not, restart it and send an email.
First of make a file and give it “execute” permission:
touch check_service.sh chmod +x check_service.sh
Now edit the file with the following script:
#!/bin/bash ### edit the following ### service=service_name email@example.com ### stop editing ### host=`hostname -f` if (( $(ps -ef | grep -v grep | grep $service | wc -l) > 0 )) then echo "$service is running" else /etc/init.d/$service restart if (( $(ps -ef | grep -v grep | grep $service | wc -l) > 0 )) then subject="$service at $host has been started" echo "$service at $host wasn't running and has been started" | mail -s "$subject" $email else subject="$service at $host is not running" echo "$service at $host is stopped and cannot be started!!!" | mail -s "$subject" $email fi fi
The go ahead and create a Cron job to run periodically (you can use this to simplify your life: cron.help).
This is an example to run this script every day at 01:00:
0 1 * * * /home/username/scripts/check_service.sh