Date: Fri, 25 Jun 1999 09:28:00 +0300 From: Ruslan Ermilov <ru@ucb.crimea.ua> To: Scott Worthington <SWorthington@hsag.com> Cc: freebsd-questions@FreeBSD.ORG, wmptl@MNSi.Net Subject: Re: cron difficulties Message-ID: <19990625092800.C5584@relay.ucb.crimea.ua> In-Reply-To: <s7723d69.065@internal.hsag.com>; from Scott Worthington on Thu, Jun 24, 1999 at 02:14:34PM -0700 References: <s7723d69.065@internal.hsag.com>
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On Thu, Jun 24, 1999 at 02:14:34PM -0700, Scott Worthington wrote:
> Alright, Nathan... I'm not sure that anyone has really helped you with
> your cron problem.
>
> Here's what is going on (and how to solve the problem):
>
> Your cron'ed software is generating output, there are two kinds:
> standard output
> standard error
>
> This is controlled by your shell. To learn more, type 'man sh'
> Press the '/' key and type in standard error.
>
> Okay, here's the problem with your cron:
> You are going to redirect the standard out AND standard error to the
> device null.
>
> nameofcommand 2>&1 > /dev/null
>
It's better to write ``nameofcommand >/dev/null 2>&1'' instead.
> 'nameofcommand' is the command that you want run
> 2>&1 tell the shell that both the standard error and standard output
> are going to be redirected (NOT PIPED) to the device /dev/null
> which 'throws the data into the bit bucket--bye'.
>
> Let us know your results.
>
[...]
> If anyone out there knows how turn off the mail feature of cron altogether
> that would be nice, if not for just the cron jobs that are causing
> annoyances, a copy of the /etc/crontab follows appends this note.
>
According to crontab(5) manpage:
} If MAILTO is defined (and non-empty), mail is sent to the user so named.
} If MAILTO is defined but empty (MAILTO=""), no mail will be sent.
^^^^^^^^^^^^^^^^^^^^
} Otherwise mail is sent to the owner of the crontab.
Cheers,
--
Ruslan Ermilov Sysadmin and DBA of the
ru@ucb.crimea.ua United Commercial Bank,
ru@FreeBSD.org FreeBSD committer,
+380.652.247.647 Simferopol, Ukraine
http://www.FreeBSD.org The Power To Serve
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