disk-space-monitor

#!/bin/bash
THRESHOLD=80
mount_point="$1"
email="$2"
ROOT_PERCENTAGE=$(df -h / | grep -vE '^Filesystem' | awk '{ print $5 }' | cut -d'%' -f1)
DATA_PERCENTAGE=$(df -h ${mount_point} | grep -vE '^Filesystem' | awk '{ print $5 }' | cut -d'%' -f1)

if [ $ROOT_PERCENTAGE -ge $THRESHOLD ] || [ $DATA_PERCENTAGE -ge $THRESHOLD ]; then
	message_text="<html><body>
Almost out of disk space on $(hostname)<br />
Root Disk Usage: $(df -h / | grep -vE '^Filesystem')<br />
Data Disk Usage: $(df -h ${mount_point} | grep -vE '^Filesystem')
</html></body>"
	echo $message_text | mailx -a 'Content-Type: text/html' -s "Alert: Almost Out of Disk Space on $(hostname)" $email
fi