Shell Script for Check Disk Space and Send Mail Report

Normally our server disk space will be increase at the same time we are not monitoring periodically, we know what will happen if the disk space is full. So create a shell script and send alert to you.

Create a shell file diskreport.sh and give execute permission,

copy the following line to shell file,

#!/bin/sh


df -HlP | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read output;


    do


      echo $output


      usep=$(echo $output | awk '{ print $1}' | cut -d'%' -f1 )


      partition=$(echo $output | awk '{ print $2 }' )


    


        if [ $usep -ge 95 ]; then


        echo "Running out of space \"$partition ($usep%)\" on $(hostname) as on $(date)" |


        mail -s "Alert: Almost out of disk space $usep%" xyz@domain.com abc@domain.com


        fi


    done

Set Cronjob:

Set cronjob on everyday for example morning 1.00 AM, Edit a cronjob file and add a line,
 

00 1 * * * /bin/sh /root/diskreport.sh

Finally, restart cron service,