#!/bin/bash

fs=`df -m | grep /dev/sda2 | sed -e 's/[[:space:]]\+/ /g' | cut -d ' ' -f 4`
mem=`free -m | grep "buffers/cache" | sed -e 's/[[:space:]]\+/ /g' | cut -d ' ' -f 4`
cpu=`uptime | sed -e "s/[[:space:]]/\n/g" | tail -n 1`

if [ $fs -le 8192 ]; then
    echo "Only $(($fs / 1024)) GB left in the file system"
fi

if [ $mem -le 128 ]; then
    echo "The system is starving on memory, $mem MB left free"
fi

#Multiply by number of CPU cores
if [ `echo "$cpu < 0.98" | bc` -eq 0 ]; then
    echo "The system is starving on cpu, $cpu is load average for the last 15 min"
fi