on ubuntu 11.04, why isn't rsyslog logging my kernel msgs?
On Wed, Aug 10, 2011 at 12:42:10PM -0400, Robert P. J. Day wrote:
> probably something stupid i'm doing but on my 64-bit ubuntu 11.04
> system, i'm loading kernel modules that print simple strings using
> printk() but nothing is showing up in /var/log/kern.log.
Do you see them in dmesg?
Do you specify the severity level for those printk messages?
> i've verified that rsyslog is running, and here's the salient bit
> from /etc/rsyslog.d/50-default.conf:
> kern.* -/var/log/kern.log
> which i've always understood is to send all kern-level messages to
> that log file, but nothing shows up.
Do normal kernel messages show up there?
> i've even used "logger" to try to send a message like that:
> $ logger -p kern.info "hi there"
> but, still, nothing.
Check /var/log/syslog, you will see your "hi there" message there. I'm
not sure why the 'kern' facility ends up being ignored. Could be a
security measure: you don't want arbitrary users to insert fake messages
pretending to be from the kernel in your log files.
> i've read in a couple places that going back to syslog-ng will fix
> things, but i'd still like to know what i'm doing wrong. thanks.
A: Because it messes up the order in which people normally read text.
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