On Wednesday 01 April 2009 20:29:00 G. Matthew Rice wrote:
> Alan McKinnon <[email protected]> writes:
> > The answer is spelled out in detail, covering all possible combinations,
> > in the man page (assuming you are talking about vixie-cron which afaik is
> > the only one LPI covers).
> >
> > In other words, there is no excuse for not knowing exactly how it works.
>
> Well, I'm certainly confused :)
>
> The statement that I've seen a couple of times that "if neither file exists
> then only suport user can use crontab" doesn't fit with my quick experiment
> on Ubuntu 8.04 and my reading of the Lenny crontab(1) man page.
>
> Yeah, I finally found reference to these files on Ubuntu.  I didn't expect
> them in the crontab(1) (ie. user) man page.
>
> The Ubuntu and Debian crontab(1) page states:
>
>     If the /etc/cron.allow file exists, then you must be listed therein in
>     order to be allowed to use this command.  If the /etc/cron.allow file
>     does not exist but the /etc/cron.deny file does exist, then you must
> not be listed in the /etc/cron.deny file in order to use this command.  If
> neither of these files exists, then depending on site-dependent
> configuration parameters, only the super user will be allowed to use this
>
>     command, or all users will be able to use this command. For standard
>     Debian systems, all users may use this command.
>
> Nice waffling on the super user vs all user access.  But it does default to
> the "no /etc/cron.* files means access for all" rule.

That's a Debianism, vixie-cron does not ship like that.

Vixie-cron's shipped defaults are quite simple: the same as Lenny but without 
the site-dependant configuration bit.

-- 
alan dot mckinnon at gmail dot com
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