How to recover linux machine from kernel panic error?
Kernel panic boot rescue:when there is a kernel panic on server, we might need to have a serious look on it, That too if its a production box then you must consider it very seriously. Normally the below steps are used at first as a recovery method for restoring your machine from kernel panic.
A typical entry in menu.lst looks like this:
title Red Hat Enterprise Linux (2.6.32-71.el6.x86_64)
root (hd0,0)
kernel /vmlinuz-2.6.32-71.el6.x86_64 ro root=/dev/sda1 crashkernel=auto rhgb quiet
initrd /initramfs-2.6.32-71.el6.x86_64.img
From grub command line you can boot machine as follows
grub> root (hd0,0)
grub> kernel /vmlinuz-2.6.32-71.el6.x86_64
grub> initrd /initramfs-2.6.32-71.el6.x86_64.img
grub> boot
For booting like this you must be aware of the kernel you use. you can boot the machine using initrd image as above.
grub> root (hd0,0)
grub> setup (hd0) (hd0,0)
grub> quit
For rescue disk you might look at www.sysresccd.org
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