cron.daily

[Robert Meyer]

--- Cyber Source <peter at thecybersource.com> wrote:
> Hello all,
>   Can someone give me some insight into how cron.daily works or what man 
> page might explain it? I want to know how to adjust the time of day that 
> cron.daily runs and what it runs. TIA
> 


OK, if you look in /etc/crontab, you will find entries for all of the cron.*
jobs that get run and the scheduled for the system.  The entries there are
calls to the 'run-parts' program that pulls all of the files in a directory and
runs them.  In the case of daily jobs, it pulls all of the files from
/etc/cron.daily and runs them.  These files are typically shell scripts that
perform whatever tasks are needed.

You can do a 'man 5 crontab' for an explaination of the format for the
/etc/crontab file.  Note that there is one change.  In /etc/crontab, the sixth
field is the userid to run the scripts with.  Otherwise, it's the same format
as a user crontab entry.

If you want to run a particular job daily, on a different schedule than the
cron.daily run, use the 'crontab -e' command as the user that has to run the
job or 'crontab -u user -e' as root to edit the job for the user 'user'.  On my
system, cron.daily wants to run at 4:02 AM, every day.  That entry looks like:

02 4 * * * root nice -n 19 run-parts /etc/cron.daily

This means that at minute 02, hour 4, as root, run everything in
/etc/cron.daily with nice level 19 (lowest priority in the system)

Does this help?

Cheers!

Bob


		
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