After a kernel panic, it is impossible to remotely connect to the Linux server to reboot it by SSH. How to make the panic kernel automatically reboot itself?
Linux kernel has a nice feature that reboots itself after a timeout when a kernel panic happened.
Usually, it is disabled by default. To turn it on, you can set the
kernel.panic kernel parameter.
For a running system:
# echo 20 >/proc/sys/kernel/panic
Here, 20 is the number of seconds before the kernel reboots. 0 means the feature is disabled.
To make the configuration persistent, you have 2 choices:
add the kernel parameter
panic=20to your bootloader (grub or grub2).
kernel.panic = 20to /etc/sysctl.conf .
After you enabled the auto reboot after kernel panic, you may need to check the uptime and logs or create a
@reboot cron jobs to send emails or use some other mechanisms to know that there was a auto reboot caused by a kernel panic.