On startup, where does the output to dmesg get logged?
Doesn't say on the man page:
http://manpages.ubuntu.com/manpages/trusty/man1/dmesg.1.html
On startup, where does the output to dmesg get logged?
Doesn't say on the man page:
http://manpages.ubuntu.com/manpages/trusty/man1/dmesg.1.html
Usually kernel
's operation related messages are stored in a fixed sized memory called the Kernel Ring Buffer
. It's location is /proc/kmsg
. dmesg
usually prints the entries of the Kernel Ring Buffer
in a human readable format. As it is a buffer (a temporary storage) mounted under /proc
, you can imagine that it will not survive a reboot i.e. it will just show all the Kernel logs after being powered On. If you want to check all the previous Kernel logs you need to check /var/log/kern.log
, as it is being stored on the disk it will survive the reboots.