Kernel Message
Logging
The
kernel.printk
specification in the
/etc/sysctl.conf
file specifies the kernel print logging specifications.
There are 4 values specified:
- console loglevel. The lowest priority of messages printed to the console.
- default loglevel. The lowest level for messages without a specific log level.
- The lowest possible level for the console log level.
- The default value for console log level.
There are eight possible
entries per value.
- define KERN_EMERG "<0>" /* system is unusable */
- define KERN_ALERT "<1>" /* action must be taken immediately */
- define KERN_CRIT "<2>" /* critical conditions */
- define KERN_ERR "<3>" /* error conditions */
- define KERN_WARNING "<4>" /* warning conditions */
- define KERN_NOTICE "<5>" /* normal but significant condition */
- define KERN_INFO "<6>" /* informational */
- define KERN_DEBUG "<7>" /* debug-level messages */
Set the
kernel.printk
values
to
3 4 1 7
and ensure that the line
kernel.printk=3 4 1 7
exists in the
/etc/sysctl.conf
file.