Wednesday, February 22, 2012

sysctl -p

Pulled my hair out the other day looking for the klogd settings that would turn off low-level messages to the console, like dropped firewall packets.  In Lenny, there is a line that is commented out in /etc/sysctl.conf that looks like

kernel.printk = 4 4 1 7

Remove the #, run sysctl -p to make the kernel read the file again, and no more ‘warn’ level messages dumped to the console.  You could do something in rsyslog.conf to send all of the messages to a tty that’s not being used if you really wanted to have access to them on a console, but I like log files instead.

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