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List:       novalug
Subject:    Re: [novalug] how to find and stop a cron job
From:       Nino Pereira <pereira () speakeasy ! net>
Date:       2006-07-24 22:55:02
Message-ID: 1153781702.1568.42.camel () lithium
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Rob,

I believe that your suggestion must have done the trick.
I did see in the file /var/spool/cron/crontab/pereira the
offending line. I added a comment, and then commented it out as
follows: 

# stopped Journyx' wtjob (which was deleted) from sending mail telling
me of error
# 1,11,21,31,41,51 * * * *  /home/pereira/jtime/jtime/pi/bin/wtjob #
Journyx Timesheet maintenance

What worried me was the statement at the file's beginning, both in
my file and in yours (repayne): 

# DO NOT EDIT THIS FILE - edit the master and reinstall.
# (/tmp/crontab.XXXX8XqV5E installed on Fri Jul  2 00:31:58 2004)
# (Cron version -- $Id: crontab.c,v 2.13 1994/01/17 03:20:37 vixie Exp
$)
#
# start dnetc, if it's not running
#
*/10 * * * * $HOME/.scripts/start-dnetc.sh > /dev/null
#
# Submit Distributed Net blocks
#
55 18,19 * * *  $HOME/SpareCPU/dnetc --flush > /dev/null
55 19 * * *  $HOME/SpareCPU/dnetc --fetch --btime rc5-72 22 > /dev/null

So now I finally know how you manage to start dnetc every time
right after I do a booboo and have to reboot. 

This brings up the next question I've been pondering. I'd like to
back up my computer automatically every day. Presumably, I can add
to the file /var/spool/cron/crontab/pereira a line like,

23 19 * * 6 /home/pereira/maintenance/machine-update -m

which is already in my crontab file: it sends machine data to the
linux counter. But, what is the correct command? My guess is:

# backup to 133 1-st minute of 4 am every day every month every week
1   4  *  *  * /home/pereira/maintenance/backup-133 

but, how do I add the password that's necessary?

Thank you, it's always educational to get your solutions.
Since you did send your reply to the list, I will do the same
so that others can profit too.

Nino

On Mon, 2006-07-24 at 10:22 -0400, Rob Payne wrote:
> On Mon, Jul 24, 2006 at 09:02:41AM -0400, Nino Pereira wrote:
> > A program I installed (Journyx) insists on sending root
> > an email every 10 minutes or so. I want this to stop,
> > so I deleted the whole program. Just to make sure everything
> > was gone I rebooted. But, the emails keep coming.
> 
> > The documentation says that Journyx runs a cron job. Where
> > are these cron jobs listed? How do I affect them? how to
> > remove the job that sends me email?
> 
> Nino,
> 
> 'man 5 crontab' tells you the format of the crontab files, (and points
> you at /etc/crontab -- a system cron(tab) file.)
> 
> 'man -k cron' gives you a list of documentation about cron and cron
> jobs.
> 
> User (including root users) crontab files are generally stored under
> /var/spool/cron, an can be edited with the command 'crontab -e' as
> that user, or 'crontab -e -u <username>' will edit the crontab for the
> user named <username>, if you have access to edit their files (if you
> are root, or are using that command under sudo.)
> 
> My guess is that the job that's sending a message out every 10 minutes
> is using a crontab entry, within a user crontab, such as:
> 
> */10 * * * *  <command line>
> 
> or something like the following, in /etc/crontab:
> 
> */10 * * * * root <command line>
> 
> commenting that line out, if you're not sure it is the culprit, or
> deleting it if you are sure, will stop the mail messages.
> 
> 				 -rob

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