Send An Email Alert When Your Disk Space Gets Low

The following script alerts you when your root partition is almost full:

1. Update the Server : - apt-get update
2. Install mailx client :- apt-get install bsd-mailx
3. Create a File disk.sh
4. Add the Content

#!/bin/bash

CURRENT=$(df / | grep / | awk '{ print $5}' | sed 's/%//g')

THRESHOLD=9

if [ "$CURRENT" -gt "$THRESHOLD" ] ; then

    mail -s 'Disk Space Alert' ictops@gmail.com << EOF

Your root partition remaining free space is critically low. Used: $CURRENT%

EOF

fi

                                      The script sends an email when the disk usage rises above the percentage specified by the THRESHOLD variable (9% here).

Script automatically run when it added into the Crontab file

root@ubuntu:~# crontab -e

10 15 * * * /root/disk.sh (Execute the command at 3.10 pm everyday)