Modified Nixcraft Shell Script - Check For Free Disk Space and Alert Admin if over 90%

#!/bin/sh
###############################################################################
# Shell script to monitor or watch the disk space
# It will send an email to $ADMIN, if the (free avilable) percentage
# of space is >= 90%
# -------------------------------------------------------------------------
# Copyright (c) 2005 nixCraft project 
# This script is licensed under GNU GPL version 2.0 or above
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# ----------------------------------------------------------------------
# Linux shell script to watch disk space (should work on other UNIX oses )
# SEE URL: http://www.cyberciti.biz/tips/shell-script-to-watch-the-disk-space.html
# set admin email so that you can get email
# ---------
# George Milliken 03-26-2011 Modified for database platform (Linux)
###############################################################################
ADMIN="youremail@example.com"
# uncomment the TEST variable for testing
#TEST="This is a TEST"

# set alert level 90% is default
ALERT=90
#df -H | grep '/fs0'  | awk '{ print $5 " " $1 }' | while read output;
#df -H | grep '/sda'  | awk '{ print $5 " " $1 }' | while read output;
df -H |  grep -vE 'Filesystem|172|mnt|//|tmpfs|usr|boot'  | awk '{ print $5 " " $1 " " $6}' | while read output;
do
  #echo $output
  echo $usep
  usep=$(echo $output | awk '{ print $1}' | cut -d'%' -f1  )
  partition=$(echo $output | awk '{ print $2 }' )
  mount=$(echo $output | awk '{ print $3 }' )
  if [ $usep -ge $ALERT ]; then
    cat <