Hack #27

Ensky Lin

Install

sudo apt-get install linux-crashdump

https://wiki.ubuntu.com/Kernel/CrashdumpRecipe

Install

Edit /etc/default/kdump-tools

+ USE_KDUMP=1

https://help.ubuntu.com/lts/serverguide/kernel-crash-dump.html

Compress

Edit /etc/default/kdump-tools

# Makedumpfile options:
# MAKEDUMP_ARGS - extra arguments passed to makedumpfile (8).  The default,
#     if unset, is to pass '-c -d 31' telling makedumpfile to use compression
#     and reduce the corefile to in-use kernel pages only.
#MAKEDUMP_ARGS="-c -d 31"

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Network kdump on ubuntu

http://caribou.kamikamamak.com/2014/05/20/remote-kernel-crash-dump-for-debian-and-ubuntu/