[cobalt-users] crontab questions

["Menno M Jansz" <lists@xxxxxxxxx>]

I was just looking at my raq4 crontab dirs in /etc and have a few questions.

First, I have the following dirs:

cron.d/
cron.daily/
cron.half-hourly/
cron.hourly/
cron.monthly/
cron.quarter-daily/
cron.quarter-hourly/

Now oddly in /etc/crontab I only have the following:

# run-parts
01 * * * * root run-parts /etc/cron.hourly
02 4 * * * root run-parts /etc/cron.daily
22 4 * * 0 root run-parts /etc/cron.weekly
42 4 1 * * root run-parts /etc/cron.monthly

So nothing for the half-hourly and quarter dirs. Is that right?
Also what is the /etc/cron.d dir used for?

Cheers,
Menno