WHAT IS LINUX KERNEL PANICS (BASIC)

How to Troubleshoot Linux Kernel Panics (Basic)

Problem Description:

Ø  Kernal panics on linux are hard to identify and troubleshoot.

Ø  Troubleshooting kernel panics often requires reproducing a situation that occurs rarely and collecting data that is difficult to gater.

What is a kernel panic?

Ø  The Linux kernel gets into a situation where it doesn’t know what to do next. When this happens,

Ø  The kernel gives as much information as it can about what caused the problem, depending on what caused the panic.

There are two main kinds of kernel panics: 

1.     Hard Panic (also known as Aieee) 

2.    Soft Panic (also known as Oops) 

What can cause a kernel panic?

ü  Only modules that are located within kernel space can
directly cause the kernel to panic.

ü  To see what modules are dynamically loaded,

 # lsmod

ü  The above command this shows all dynamically loaded modules

(Dialogic drivers, SCSI driver, filesystem etc.

ü  In addition to these dynamically loaded modules, components that are built
into the kernel (memory map, etc.) can cause a panic.

Since hard panics and soft panics are different in nature, how to deal with each I will write in next blog.