#!/bin/bash

freememory=$(free -m | grep "cache:" | awk '{print $4}')
threshold="300"


if [ $freememory -gt $threshold ]; then
    echo "There is $freememory MB availible. Threshold not reached."
else
    echo "There is less than $threshold MB of memory availible."
    /home/david/mail.sh "There is less than $threshold MB of memory availible!! You should probably do something about that pretty soon brother!!"
fi

exit 0