[PLUG] Help diagnosing system restarts

Bill Barry bill at billbarry.org
Thu Oct 11 20:05:19 UTC 2007


0:32:28	
1:32:48	1:00:20
2:33:05	1:00:17
3:33:26	1:00:21
4:33:44	1:00:18
5:34:03	1:00:19
6:34:24	1:00:21
7:34:41	1:00:17
8:35:05	1:00:24
9:35:20 	1:00:15
10:35:41 1:00:21

On 10/11/07, Aaron Ten Clay <aaron at madebyai.com> wrote:
> alan wrote:
> > On Thu, 11 Oct 2007, Aaron Ten Clay wrote:
> >
> >
> >> All,
> >>
> >> I've got a box setup for my mother who is 300 miles away from me. I've
> >> got logsentry emailing me unusual system activity once an hour and I can
> >> ssh into the box from where I am.
> >>
> >> Here's the problem:
> >>
> >> I started noticing a couple days ago kernel boot messages in some of the
> >> hourly reports. I thought it was a bit odd but not too serious. This
> >> morning I see that every hour for the past 24 hours her system has
> >> rebooted itself. There are no obvious messages pertaining to the reboot
> >> in the log; presumably something catastrophic happens and the disk isn't
> >> sync'd before the reboot.
> >>
> >> The only pattern I've noticed thus far, by looking at the timing of the
> >> kernel boot messages, is that it's slowly getting later in the hour. For
> >> example:
> >>
> >> 00:32:28
> >> 01:32:48
> >> 02:33:05
> >> 03:33:26
> >> 04:33:44
> >> 05:34:03
> >> 06:34:24
> >> 07:34:41
> >> 08:35:05
> >> 09:35:20
> >> 10:35:41
> >>
> >> and so on. Any ideas what might be causing this? I spoke to her and she has noticed some unusual fan activity, but I'm not sure how that could explain the reboots.
> >>
> >
> > Check the hourly cron jobs.  Could be something silly like "makewhatis" or
> > it could be something else worth worrying about.
> >
> > Should be in /etc/cron.hourly.
> >
> >
> Thanks for the suggestion. I've disabled cron, we'll see if it still
> restarts. The only things cron should be running, aside from emailing
> hourly reports, is a daily rdiff-backup run that happens at 2PM.
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