#!/bin/sh
df -H -P | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read output;
do
 echo $output
 usep=$(echo $output | awk '{ print $1}' | cut -d'%' -f1  )
 partition=$(echo $output | awk '{ print $2 }' )
 if [ $usep -ge 80 ]; then
   echo "Running out of space \"$partition ($usep%)\" on $(hostname) as on $(date)" |
    mail -s "Alert: Almost out of disk space $usep%" michal.grezl@hzsol.cz
 fi
done