Getting Linux kernel debug information after a kernel crash

Question

Is there a way to get kernel previous debug information after kernel crash occurs.

I am trying to develop a kernel module which basically captures IP packets in the

Answer 1

Kernel log messages can be viewed in /var/log/dmesg files even after restart of the system.

There will be so many files with dmesg.X, and those files are previous kernel logs. dmesg is the latest file.

See difference between dmesg and /var/log/kern.log