Kdump Configuration on RHEL 6

1.  Installing the kdump Service.

~]# yum install kexec-tools

2.  Run the following Command to configure kdump in graphical environment.

~]# system-config-kdump

3.  The target setting tab.

 

 4.  The Filtering setting tab.

5.  The Expert setting tab.

6.  After completing this process first click on Apply button then reboot your machine to test the configuration and make sure service is running after reboot.

7.  After rebooting login with root

~]# /etc/init.d/kdump status

Kdump is operational

8.  Now download the debuginfo kernel from https://rhn.redhat.com

~] # rpm -ivh kernel-debuginfo-common-x86_64-2.6.32-279.5.2.el6.x86_64.rpm

~] # rpm -ivh kernel-debuginfo-x86_64-2.6.32-279.5.2.el6.x86_64

9.  Now run the following command at a shell prompt.

~] # echo 1 > /proc/sys/kernel/sysreq

~] # echo c > /proc/sysrq-trigger

Note:- This will force the linux kernel to crash, and the address-YYYY-MM-DD-HH:MM:SS/vmcore file will be copied to the location which you have selected in the configuration (/var/crash).

10.              Analyzing the core dump

~] # yum install  crash

~] # crash /var/crash/127.0.0.1-2012-09-05-16:40:44/vmcore  /usr/lib/debug/lib/module/2.6.32-279.el6.x86_64/vmlinux