$OpenBSD: README,v 1.5 2018/09/04 12:46:21 espie Exp $

+-----------------------------------------------------------------------
| Running anacron on OpenBSD
+-----------------------------------------------------------------------

To start using anacron:

Create the file /etc/anacrontab (see anacrontab(5) for
information about its format).

The following is a simple example which runs the standard
OpenBSD daily, weekly, and monthly scripts:

-----Cut
# /etc/anacrontab example
SHELL=/bin/sh
PATH=/sbin:/bin:/usr/sbin:/usr/bin
HOME=/var/log
# format: period delay job-identifier command
1   5   cron.daily      /bin/sh /etc/daily
7   10  cron.weekly     /bin/sh /etc/weekly
30  15  cron.monthly    /bin/sh /etc/monthly
-----Cut

Comment out the invocation of the corresponding jobs in root's crontab.
If your machine is left running for more than 24h at a time, you
might also want to invoke anacron from an early morning cron job.

To run anacron(8) at boot time, add the following to root's crontab(5):
@reboot	/usr/local/sbin/anacron -ds
