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I want to make a Kernel Dump File (KDUMP) forcefully on Ubuntu 18.04 LTS Any Idea?

ParkYougJoon
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  • Possible duplicate : https://stackoverflow.com/questions/17965/how-to-generate-a-core-dump-in-linux-when-a-process-gets-a-segmentation-fault and https://stackoverflow.com/questions/6152232/how-to-generate-core-dump-file-in-ubuntu – Parthiban Oct 31 '18 at 05:40
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    not meant the user core dump but Kernel core Dump – ParkYougJoon Oct 31 '18 at 06:43

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If I haven't misunderstood your question - to trigger a kdump vmcore collection, just ensure that kdump-config status is "curent state: ready to dump" and do an echo c > /proc/sysrq-trigger.

Same could be achieved by the use of magic sysrq key (alt+prntscrn+c)

The kernel.sysrq sysctl should be enabled in order to get both above working. Note that this will induce a kernel panic.

And another possibly unrelated note: stumbled upon this one while I was researching for non-working kdump collection stuck on "blue screen" on 18.04.3 LTS, so beware.

T.

rewind
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