Low disk space notifications

linux low disk space notifications

Pre-requisite

In order for the pop-up message to appear, you would need to install “libnotify-bin”.

Code:

sudo apt-get install libnotify-bin

Script

The script will check the free disk space in “/dev/sda1″. It will show a pop-up message for 30 seconds when the free space is below 100MB. If the free space is below 50MB, it will show a pop-up message for 5 minutes. You should modify these parameters to your own requirement.

Copy and paste the script below to a file called “checklowdisk”.

Code:

#!/bin/sh

DISKSPACE=`df | grep "/dev/sda1" | awk '{ print $4 }'`

if [ "$DISKSPACE" -lt "51200" ] ; then
/usr/bin/notify-send -u critical -t 300000 \
'Check low disk' '/dev/sda1 is less than 50MB.'
exit
fi

if [ "$DISKSPACE" -lt "102400" ] ; then
/usr/bin/notify-send -u normal -t 30000 \
'Check low disk' '/dev/sda1 is less than 100MB.'
fi

Setting up the script

Make the script executable:

Code:

chmod +x checklowdisk

Change file ownership to root:

Code:

sudo chown root:root checklowdisk

Move file to “/usr/bin”:

Code:

sudo mv checklowdisk /usr/bin/

Set-up crontab

I chose to run the script hourly using crontab.

Edit crontab:

Code:

crontab -e

Add this line in the editor:

Code:

00 * * * * env DISPLAY=:0 /usr/bin/checklowdisk

Save and close the editor. The crontab is now configured, and the script will run at the hour.
thanx:Chewearn

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