#!/usr/bin/php
<?php
$free = disk_free_space('/');
$freeFormatted = sprintf("%.1f",$free/1024/1024);
//$min=1073741824*10;//10GB
$min=1073741824*5;//5GB
if ($free < $min) {
	`/home/pusher/bin/notify-send-cron -i /usr/share/icons/oxygen/48x48/status/dialog-error.png -t 5000 "Low free space" "Only $freeFormatted MB left!"`;
}