#!/bin/bash

total_disk=`df -k | grep -v Filesystem | awk '{print int($2)}'`

available_disk=`df -k | grep -v Filesystem | awk '{print int($4)}'`

total=

available=

for t in $total_disk

do

total=$((total+t));

done

for a in $available_disk

do

available=$((available+a));

done

echo $total,$available