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

Actually, the /var/log/dmesg file contains the current boot print message log. The /var/log/kern.log file contains your previous boot kernel print message log in Ubuntu. In other Linux flavours it will contain in the /var/log/messages file in Fedora, etc..