# Perform daily/weekly/monthly maintenance.
1 3 * * * root periodic daily
15 4 * * 6 root periodic weekly
30 5 1 * * root periodic monthly
# service cron status
. /bin/sh
? Maybe verify with ldd /bin/sh
.root@mycomputer # crontab -l
MAILTO=myaccountToSeeTheResult
@reboot /somewhere/script.sh
OK, my laptop is not for 24hr use. So your idea is useful or running the /etc/periodic/weekly/310.locate as root at suitable time.(checked by running the file now.)run your PC 24h per day