Available disk usage alert setup to run weekly on crontab

disk-usage-alert.cron

#!/bin/bash

# /etc/cron.weekly/

LIMIT="85"
MAILTO=""
SUBJECT="Disk Usage Alert!"
BODY="WARNING! $(hostname) disk space is currently at ${USED}% capacity."


# Get usage percentage of root disk space
USED=$(df -h | grep "/dev/mapper" | awk '{ print $5 }' | cut -d'%' -f1)

# If usage is greater than limit
if [ $USED -gt $LIMIT ]; then

# Start file reaper in the backgroud
bash ~/crontab/retention_reaper > ~/crontab/reaper.log 2>&1 &
PSID=$!

# Send email alert
BODY="WARNING! $(hostname) disk space is currently at ${USED}% capacity.

The following directories (older than 15 days) will be removed:

$(find /home/sftpuser/*/ftp/* -type d -mtime +15)

Process (${PSID}) will remove the directories above in 24 hours unless killed [kill ${PSID}].
"

echo -e "$BODY" | mail -s "$SUBJECT" "$MAILTO"

fi