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.
