My-Shell-Scripts/watchservice_and_sendmail.sh at master · lifeoverlinux/My-Shell-Scripts · GitHub

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#!/bin/bash
# Author: Ibrahim Ucar
# Written in: Debian 9.x
# Date: 19.10.2018
# Mail: ucribrahim@gmail.com

# -------ABOUT THIS SCRIPT------- #

# This script watches a service process if the process of service stops then script sends an email to the user that
# let the user know that a service (e.g. Firefox) stopped. This script just an example, you can watch any services or
# configure as you wish.

# You can set this script to CRON to make this script works every minute, hour, day, etc.

# ------------STEPS------------- #
# First: Install "ssmtp" service and then configure it. Make sure that you can send mail with "ssmtp" command line.
# Second: Define a mail address to the downline. Otherwise script will not send e-mail!
# ------------STEPS------------- #

email="username@domain.com"

# Get the process of the "firefox" service.
pid=$(ps -e | pgrep firefox | wc -l | xargs echo -n)

# Simple echo massage.
echo "I'm checking the process of (Firefox Web Browser)... Please wait a second."

# IF conditions.)
if [ $pid -eq 0 ]; then
        echo
        echo "Firefox process doesn't exist. I'm sending an e-mail to the user."
        echo "Firefox process doesn't exist. This is a warning message that Firefox service stopped." | ssmtp $email

else
        echo
        echo "The process of ( Firefox Web Browser ) exist! It means Firefox service working."
fi