Enabling kernel crash dumps on RHEL 6

Robert Leong -

Using GUI

Link to download the PDF for enabling kernel crash dumps for RHEL 6.2 is at the end of the article.

Internal reference ZD 18666


Using CLI

Additional notes on panic dumps, tested on RHEL 6.2 and 6.4

Make sure the entry

core_collector makedumpfile -c -d 31

exists in


The dump will be in this path:



To manually caused a kernel panic:

echo 1 > /proc/sys/kernel/sysrq; echo c > /proc/sysrq-trigger


Best practice note

It has been observed that no vmcore gets captured after a panic, this could depend on how the Venice is rebooted after the crash.  A soft reset of control/alt/delete via an attached KVM to the Venice server will likely allow it to save the kernel dump.  If a hard reset or power cycle is performed instead, this will likely not save the crash dump.


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