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how to find the why linux crash if it crashed?

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Vieux 16/11/2007, 02h30   #1
H.H. Ding
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Par défaut how to find the why linux crash if it crashed?

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I have never find any log for why the linux crash. Is it reasonable?
or should I tun on some options in some config file?
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Vieux 16/11/2007, 04h30   #2
Kamaraju Kusumanchi
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Par défaut Re: how to find the why linux crash if it crashed?

On Fri, 16 Nov 2007 10:24:59 +0800, H.H. Ding wrote:
>
> I have never find any log for why the linux crash. Is it reasonable? or
> should I tun on some options in some config file? -----BEGIN PGP


Be specific and provide more details.

Which distribution of Linux are you using?
What software is crashing and what are the versions of the software? What
steps are necessary to reproduce the crash?

Just saying that linux is crashing is a very broad statement and no one
can offer you any useful suggestions without more information.

hth
raju
--
Kamaraju S Kusumanchi
http://www.people.cornell.edu/pages/kk288/
http://malayamaarutham.blogspot.com/


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Vieux 16/11/2007, 04h50   #3
Douglas A. Tutty
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Par défaut Re: how to find the why linux crash if it crashed?

On Fri, Nov 16, 2007 at 10:24:59AM +0800, H.H. Ding wrote:
> I have never find any log for why the linux crash. Is it reasonable?
> or should I tun on some options in some config file?


It depends on what caused the crash. Sometimes a message will be sent
by syslog to /var/log/syslog. Sometimes the log will get written to
disk before the crash. Often it won't.

A good way to solve this quandry in critical machines is to have their
syslog send to the syslog of another box.

Doug.


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Vieux 16/11/2007, 05h50   #4
Andrew Sackville-West
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Par défaut Re: how to find the why linux crash if it crashed?

On Thu, Nov 15, 2007 at 11:43:06PM -0500, Douglas A. Tutty wrote:
> On Fri, Nov 16, 2007 at 10:24:59AM +0800, H.H. Ding wrote:
> > I have never find any log for why the linux crash. Is it reasonable?
> > or should I tun on some options in some config file?

>
> It depends on what caused the crash. Sometimes a message will be sent
> by syslog to /var/log/syslog. Sometimes the log will get written to
> disk before the crash. Often it won't.


always pertinent to mention: alt-sysrq-s to sync the disks before
pulling the plug on a locked hard box. Its very satisfying to watch
the drive light flicker just before you kill the power for real.

A

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