If we want the system to automatically reboot after a timed delay when experience the kernel panics and system is inaccessible on Red Hat Enterprise Linux 4, 5, and 6.

•To enable automatic reboots after a kernel panic, edit the /etc/sysctl.conf file and add the following lines:

# When kernel panic’s, reboot after 10 second delay
kernel.panic = 10

•Run the command sysctl -p to re-read your sysctl.conf file.
•This will cause the system to reboot after 10 seconds after a kernel panic.