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Oracle Linux: How To Manually Capture Vmcore Dump When Linux OS Hangs On Baremetal Hosts And Virtual Machines (VMware Guest /Oracle VM) (Doc ID 2091397.1)

Last updated on OCTOBER 12, 2022

Applies to:

Linux OS - Version Oracle Linux 5.2 and later
Oracle Cloud Infrastructure - Version N/A and later
Oracle Exalogic Elastic Cloud X2-2 Hardware - Version X6 and later
Linux x86-64


Generating vmcore from a hung machine.


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In this Document
 1. Configure kdump and make sure the core is generated by issuing "echo c > /proc/sysrq-trigger" .

A working config will dump the vmcore in the mentioned location. 
 2. Edit the file /etc/sysctl.conf and add the below lines to enable panic on different scenarios.
 3. Trigger the crash.

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