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  Ubuntu 12.04 kernel configuration automatically restart and crash dump
     
  Add Date : 2018-11-21      
         
         
         
  The default Ubuntu 12.04 is not configured kernel crash restart automatically and dump, resulting in the occurrence of kernel panic when there is no core dump file to analyze, and stuck in a kernel panic interface, in order to facilitate the search kernel crash causes the need for kernel crash auto-restart configuration and dumps up configuration, the configuration steps are as follows:

The first step in configuring the kernel to crash auto-restart

After adding kernel.panic to the kernel parameters, 10 kernel crash 10 seconds, the system automatically restart

vi /etc/sysctl.conf

kernel.panic = 10

The second step to verify whether the auto-restart mechanism to take effect, you need to configure sysrq

Kernel.sysrq to add kernel parameters to take effect 1

vi /etc/sysctl.conf

kernel.sysrq = 1

Run the command to make the configured parameters take effect, or restart the system

sysctl -p /etc/sysctl.conf

Check whether the configured parameters take effect

Simulation system kernel crash, press alt + sysrq + c three keys, or run the following command

echo c> / proc / sysrq

Look to see a kernel panic and reboot countdown

The third step is to configure the kernel dump

Under the new system needs to be upgraded, or can not install software via apt-get

apt-get update

Installation dumps

sudo apt-get install linux-crashdump

Check whether the entry into force

Testing, simulation system kernel crash, press alt + sysrq + c three keys, or run the following command

Found that the system crashes, and stuck to live, not to send dump, no reboot!

After searching for information, sending such a case, it may core dump and memory configuration is not enough of a relationship, then modify the core dum memory configuration

Modified to 512M Size

Rebuild grub.cfg

Then test success.
     
         
         
         
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