How dose cron deamon work?

I have a script that i wan't to be runed once a week.

I have startted the cron deamon i rc. then I copyed the my script to the /etc/cron.weekly/


Is this enought. Will the script run every week now?

If /etc/cron.weekly is referenced correctly in /etc/crontab, yes.

My crontab file:

# If you don't want the output of a cron job mailed to you, you have to direct
# any output to /dev/null. We'll do this here since these jobs should run
# properly on a newly installed system, but if they don't the average newbie
# might get quite perplexed about getting strange mail every 5 minutes. :^)
#
# Run the hourly, daily, weekly, and monthly cron jobs.
# Jobs that need different timing may be entered into the crontab as before,
# but most really don't need greater granularity than this. If the exact
# times of the hourly, daily, weekly, and monthly cron jobs do not suit your
# needs, feel free to adjust them.
#
# Run hourly cron jobs at 47 minutes after the hour:
47 * * * * /usr/bin/run-parts /etc/cron.hourly 1> /dev/null
#
# Run daily cron jobs at 4:40 every day:
40 4 * * * /usr/bin/run-parts /etc/cron.daily 1> /dev/null
#
# Run weekly cron jobs at 4:30 on the first day of the week:
30 4 * * 0 /usr/bin/run-parts /etc/cron.weekly 1> /dev/null
#
# Run monthly cron jobs at 4:20 on the first day of the month:
20 4 1 * * /usr/bin/run-parts /etc/cron.monthly 1> /dev/null

If i wan't a mail to be seend to root when the programs has been run how do I do then.

30 4 * * 0 /usr/bin/run-parts /etc/cron.weekly

is that correct. Just to take away the ">1 /dev/null file".

What could be wrong if you aren't receiving email from Cron? I used to receive the cron.daily output but now I'm not. Also I could like to be able to receive other cron emails like cron.monthly etc.. Where do I set this?

Oh, I should note I'm receiving other email from root like the logwatch report.