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dmesg TODO

Print the system log:

dmesg

http://www.web-manual.net/linux-3/the-kernel-ring-buffer-and-dmesg/

TODO what kernel function puts messages there?

The messages that appear on the screen at startup are shown there as well. But there are messages which only dmsg shows. TODO what is the difference?

/var/log/dmesg

The messages are found in /var/log/dmesg and rotated log files dmesg.N.gz.

TODO: rotated log files contain similar content to the dmesg. Where is the content od dmesg coming from?

/proc/kmsg

kmsg

TODO when I: sudo cat /proc/kmsg it is empty and hangs. Why?

/var/log/boot.log

TODO what kernel function puts messages there?