So you are at your linux system and you restarted and all the sudden on boot, you get a: Kernel Panic ... What do you do now? Well first of all don't you panic! First step to take would be to boot your system in rescue mode. To do that you need any sort of a live CD. Get a Ubuntu CD and load using it. There will be a prompt that says load using the CD. This is your system booting off the CD. Now that you have access to the Server. What you need to do is get access to your actual physical system.