Verify that the kernel dump is collected correctly

Generate a kernel panic and then verify that the kernel dump is collected correctly.

1. Execute the following command to generate a kernel panic:

   # echo c > /proc/sysrq-trigger

   When a kernel panic occurs, a kernel dump is collected, and then the host restarts.

2. After the host restarts, verify that a kernel dump (vmcore file) was created in the /var/crash/hdlm directory.

   # ls -lR /var/crash/
   /var/crash/:
   total 0
   drwxr-xr-x 2 root root 4096 mmm dd hh:mm 127.0.0.1-yyyy-mm-dd-hh:mm:ss
   
   /var/crash/hdlm/127.0.0.1-yyyy-mm-dd-hh:mm:ss:
   total 58732
   -r-------- 1 root root 60074832 mmm dd hh:mm vmcore
   -rw-r--r--. 1 root root    63270 mmm dd hh:mm vmcore-dmesg.txt
   #

Specification of the necessary settings for using the kdump function is now finished.