The kdump mechanism is a Linux kernel feature, which allows you to create dumps if your kernel crashes. It produces an exact copy of the memory, which can be analyzed for the root cause of the crash.
SysRq is a feature supported by the Linux kernel, which allows you to send key combinations to it even when your system becomes unresponsive.
First, we'll set up kdump and SysRq, and afterwards, I'll show you how to use it to debug a dump.
Let's take a look at how this is installed and configured:
~]# yum install -y kexec-tools
crashkernel=autois present in the