post_install() {
	line="*/5 * * * *       /usr/local/bin/rrd_hddtemp.pl > /dev/null"
	(crontab -l; echo "$line") | crontab -
	line="*/5 * * * *       /usr/local/bin/rrd_disk.pl > /dev/null"
	(crontab -l; echo "$line") | crontab -
	line="*/5 * * * *       /usr/local/bin/rrd_traffic.pl > /dev/null"
	(crontab -l; echo "$line") | crontab -
	line="*/5 * * * *       /usr/local/bin/rrd_mem.pl > /dev/null"
	(crontab -l; echo "$line") | crontab -
	line="*/5 * * * *       /usr/local/bin/rrd_cpu.pl > /dev/null"
	(crontab -l; echo "$line") | crontab -
}

post_upgrade() {
 	/bin/true
}


pre_remove() {
	crontab -l | grep -v rrd_ | crontab - 

}