Someone can told me where from get the default crontab settings of root for NetBSD 6.0 please 
### SOLVED ###
The default crontab rules are in etc.tgz /var/cron/tabs/root
# $NetBSD: crontab,v 1.15 2002/11/27 15:09:17 perry Exp $
#
# /var/cron/tabs/root - root's crontab for NetBSD
#
SHELL=/bin/sh
PATH=/bin:/sbin:/usr/bin:/usr/sbin
HOME=/var/log
CRON_WITHIN=7200
#
#minute hour mday month wday command
#
*/10 * * * * /usr/libexec/atrun
#
# rotate log files every hour, if necessary
0 * * * * /usr/bin/newsyslog
#
# do daily/weekly/monthly maintenance
15 3 * * * /bin/sh /etc/daily 2>&1 | tee /var/log/daily.out | sendmail -t
30 4 * * 6 /bin/sh /etc/weekly 2>&1 | tee /var/log/weekly.out | sendmail -t
#30 5 1 * * /bin/sh /etc/monthly 2>&1 | tee /var/log/monthly.out | sendmail -t