dmesg and /var/log/messages loglevel configuration
I dont' know if I am getting it right, but I have understood that the dmesg kernel messages are stored in /var/log/messages by the help of syslog, and that syslog was adding a timestamp before each message, is that right?
In that case, why are not all messages of dmesg stored in /var/log/messages and would there be a loglevel we could change so that it woudl log all messages from dmesg?
In that case, why are not all messages of dmesg stored in /var/log/messages and would there be a loglevel we could change so that it woudl log all messages from dmesg?
ASKER
I have very few information in this /var/log/boot.log file, much less than in the dmesg output.
its in
/var/log/dmesg
/var/log/dmesg
ASKER
The output of dmesg seems to contain only the boot up messages. I had a lot of "TCP: Treason uncloaked!" messages when I typed 'dmesg'. I have deleted them with 'dmesg -c', and yet I would like to know where they have been stored. I thought it was in /var/log/messages, but yet they are not there nor in any suggested file above. Isn't this related to a loglevel configuration?
syslog 'routes' all messages it receives to multiple logfiles and/or console. You need to examine /etc/syslog.conf. Manual pages (syslog and syslog.conf) should help you diagnose the problem (if there is one).
They are not stored on the disk, it's the kernel _buffer log_. These occur before any syslog service is started and reside only in the buffer. If you want, you can store them manually:
dmesg -c > /var/log/dmesg_log
or add this into one of your startup boot scripts to perform this automatically.
dmesg -c > /var/log/dmesg_log
or add this into one of your startup boot scripts to perform this automatically.
sorry my mistake actually the above happens automatically after boot.
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Hello, Jozk0.
I am using syslogd. The following line in /etc/syslog.conf is probably what I need:
kern.* /var/log/kernel_log
This seems to log almost everything, so I must wait that the event I am looking for comes out again and see if it is there. But as it seems to log all kernel messages, and that dmesg shows all kernel messages, I think that this is the solution to my problem!
Thanks a lot,
Daniel
I am using syslogd. The following line in /etc/syslog.conf is probably what I need:
kern.* /var/log/kernel_log
This seems to log almost everything, so I must wait that the event I am looking for comes out again and see if it is there. But as it seems to log all kernel messages, and that dmesg shows all kernel messages, I think that this is the solution to my problem!
Thanks a lot,
Daniel
/var/log/boot.msg
this is on opensuse.