#!/bin/bash 
########################################
## declare mail variables
##email subject 
subject="Server Memory Status Alert"
## sending mail to
to="webmaster@briansnelson.com"
## send carbon copy to
##Like to also send to my phone 
also_to="phonealert@att.net"

## get total free memory size in megabytes(MB) 
free=$(free -mt | grep Total | awk '{print $4}')

## check if free memory is less or equals to  100MB
if [[ "$free" -le 100  ]]; then
        ## get top processes consuming system memory and save to temporary file 
        ps -eo pid,ppid,cmd,%mem,%cpu --sort=-%mem | head >/tmp/top_proccesses_consuming_memory.txt

        file=/tmp/top_proccesses_consuming_memory.txt
        ## send email if system memory is running low
        echo -e "Warning, server memory is running low!\n\nFree memory: $free MB" | mailx -a "$file" -s "$subject"  "$to" "$also_to"
fi

exit 0