Re: Newbie: Writing console messages to a file FC2 2.6.5

• Previous message: Timothy Murphy: "Re: I think I need a sound/ALSA guru."
• In reply to: Clive at Rational: "Newbie: Writing console messages to a file FC2 2.6.5"
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To: For users of Fedora Core releases <fedora-list@redhat.com>
Date: Tue, 02 Aug 2005 15:31:27 -0400

On Tue, 2005-08-02 at 12:09 +0100, Clive at Rational wrote:
> Hello,
>
> I have an unreliable FC2 / 2.6.5 kernel machine. I
> am running it as a file server. From time to time the
> machine "hangs" or puts out lots of messages of the
> form
>
> <+0x0nnnnnnn> ... debug info ...
>
> I am guessing these are kernel error messages. I
> want to capture these messages so I can post them when
> an error occurs. At the moment the messages are not
> written to any file that I can find - so I can't
> retreive them, then post them once I restart the
> machine.
>
> Now the reading I have done has got me as far this
> this .....
>
> The kernel messages are directed to the console
> because of the following setting
>
> /etc/syslog.conf
> # Log all kernel messages to the console.
> # Logging much else clutters up the screen.
> kern.* /dev/console
>
>
> My question is
>
> Can I change this to
> # Log all kernel messages to the console.
> # Logging much else clutters up the screen.
> kern.* /syslog/CRLconsolelog

Probably want to log in /var/adm or /var/log.

> So all messages are written to a file?
>
> Can I get the messages written to BOTH a file and the
> console at the same time?

The man page on syslog.conf has some examples:

       This will store all messages with the priority crit in the
file /var/adm/critical, except for any kernel message.

              # Kernel messages are first, stored in the kernel
              # file, critical messages and higher ones also go
              # to another host and to the console
              #
              kern.* /var/adm/kernel
              kern.crit @finlandia
              kern.crit /dev/console
              kern.info;kern.!err /var/adm/kernel-info

>
> Will this capture ALL Error messages that appear at
> the console?
>
> What happens if the machine goes into a loop - I don't
> realise - and eventually the file fills the whole
> disk? Will I then be able to restart Linux?
>
> Anyway of cycling this "kernel/console message" log
> file automatically?

Yes. See /etc/logrotate.d/ for some examples, and the logrotate man
page.

Phil

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• Previous message: Timothy Murphy: "Re: I think I need a sound/ALSA guru."
• In reply to: Clive at Rational: "Newbie: Writing console messages to a file FC2 2.6.5"
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