shell script for httpd, mysql service check and restart on down

servicecheck.sh

#!/bin/bash

#about: checking services, if down ? restart
#note: dont forget to add this script to cron for automation

#define services to check
services=( "httpd" "mysqld" )

for service in "${services[@]}"
do
if (( $(ps -ef | grep -v grep | grep $service | wc -l) == 0 ))
then
	/etc/init.d/$service restart
fi
done

##########

# optional check: if free memory spaces < 100mb ? clear caches
if (( $(free -m | grep -i "mem" | awk '{print $4}') < 100 ))
then
	eval $(echo 3 > /proc/sys/vm/drop_caches)
fi

##########

#optional: send an email to system admin when services are restarted
#note: set a restart flag to 1 within above code, the service restart if condition.

#define time
now=$(date +"%F %H:%M:%S")
#define system admin's email address
email="system@admin.com"

if [ $restartflg -gt 0 ]
then
	printf "services are downed and automatically restarted on $now" | 
	mail -s "System Message: service restarted" $email
fi