[mrtg] keep getting cron warning mails even...

Mersberger, Robert robert.mersberger at goldenliving.com
Thu Jan 22 20:42:34 CET 2009

 Have you looked at your crontab?  do you have a MailTo statement in there that may be your problem.

-----Original Message-----
From: mrtg-bounces at lists.oetiker.ch [mailto:mrtg-bounces at lists.oetiker.ch] On Behalf Of mrmrmrmr
Sent: Thursday, January 22, 2009 1:00 PM
To: mrtg at lists.oetiker.ch
Subject: Re: [mrtg] keep getting cron warning mails even...

Thanks for your comments.
I've just tried putting a command which produces error output to the same crontab.
With the redirection "> /dev/null 2>&1" , I didn't get any email from that cron job.
However, mrtg produces mail from error messages.

I am sure that is the specific cron job that mrtg is run, because there is no other crontab of any other user.
I don't know why mrtg produces these. I can't track it also, because the error is not occuring at each run.

Anyway, I installed Cacti running RRDtool. Maybe I'll pass to Cacti.


At 01:47 PM 1/21/2009, you wrote:

>you are not talking to yourself but I don't understand your 
>comment.what is the relevance with OS ? This is a Linux installation. Distro is CentOS 4.

The OS handles the ooutput of the cronjob - not mrtg.

Maybe someone else who uses CentOS can chime in, but some things to try:

Like I mentioned before, set up a cron job for every 10 minutes to do a LS /  > /dev/null 2>&1 Does that get e-mailed?

Are you SURE it's that cronjob? Set up that same job every 10 minutes. Do you get an e-mail every 10 minutes?

Do you have other cron jobs that have output to /dev/null ? Do they get e-mailed also?

Everything I'm seeing on CentOS says
 > /dev/null 2>&1

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