HOWTO+-+Delete+recordings+after+a+time+period

Create a file in /etc/cron.daily/ with name 'monitor_cleanup' and put in it the folowing text.

/usr/bin/find /var/spool/asterisk/monitor/ -maxdepth 1 -type f -mtime +30 | /usr/bin/xargs /bin/rm -f >/dev/null 2>&1
 * 1) !/bin/sh

+30 meen for 30 days.