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created script to check free space
				[ /usr/local/sbin/check_free_space.sh ]
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#!/bin/sh

# --------------------------------------------------------------------
# purpose:	check free space per partition
#		notify admin if free space is critical
# args:		none
# deps:		bash, GNU utils, logger
# --------------------------------------------------------------------



# --------------------------------------------------------------------
# configuration
# --------------------------------------------------------------------
PROGNAME=$(basename $0)
export PATH="/bin:/sbin:/usr/bin:/usr/sbin"
# --------------------------------------------------------------------



# --------------------------------------------------------------------
# configure destination address for emails (admins)
# --------------------------------------------------------------------
if [ -f /etc/default/suk_scripts ]; then
	. /etc/default/suk_scripts;
else
	ROOTMAIL="root@`hostname --fqdn`"
fi
# --------------------------------------------------------------------



# --------------------------------------------------------------------
# functions
# --------------------------------------------------------------------
function log() {
	/usr/bin/logger \
		-i -p kern.crit -t ${PROGNAME} \
		"CRITICAL: $1 has less than $2 KB space left"
}

function log_mail() {
	df --k -P --sync | mail \
		-s "$1 has less than $2 KB space left" ${ROOTMAIL}
	log $1 $2
}
# --------------------------------------------------------------------



# --------------------------------------------------------------------
# check free space per partition
# --------------------------------------------------------------------
df --k -P --sync | grep -v "Used" | while read i; do i=( ${i} )
	case ${i[5]} in
		/boot | /home )
			if [ ${i[3]} -lt 4096 ]; then
				log_mail ${i[5]} 4096
			fi
			;;

		/tmp | /usr )
			if [ ${i[3]} -lt 98304 ]; then
				log_mail ${i[5]} 98304
			fi
			;;

		/usr/local | /var/log | /var/spool/postfix )
			if [ ${i[3]} -lt 196608 ]; then
				log_mail ${i[5]} 196608
			fi
			;;

		/var/tmp )
			if [ ${i[3]} -lt 24576 ]; then
				log_mail ${i[5]} 24576
			fi
			;;

		*)
			if [ ${i[3]} -lt 262144 ]; then
				log_mail ${i[5]} 262144
			fi
			;;
	esac
done
# --------------------------------------------------------------------


exit $?

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added check_free_space as cronjob     [ /etc/cron.d/check_free_space ]
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	0 */1 * * * root /usr/local/sbin/check_free_space.sh
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