#!/bin/bash
ADMIN="tuamail@mail.com"
ALERT=80
check_part=/dev/md0
df -H  > /tmp/df.out
cat /tmp/df.out | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read output;
do

  usep=$(echo $output | awk '{ print $1}' | cut -d'%' -f1  )
  partition=$(echo $output | awk '{ print $2 }' )

  if [ $partition = $check_part ]; then
        if [ $usep -ge $ALERT ]; then
                echo "Fine dello spazio \"$partition ($usep%)\" su $(hostname) il $(date)" | mail -a "From: script check space" -s Space-Central Server $ADMIN 
        fi
  fi
done