A script to warn when disks are getting full

diskspace

#!/bin/bash
EMAIL="[email protected]"
WARNING_LEVEL=90
df -H | 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 $WARNING_LEVEL ]; then
    echo "Running out of space \"$partition ($usep%)\" on $(hostname) as on $(date)" | mail -s "Alert: Almost out of disk space $usep%" $EMAIL
  fi
done