To test the configuration, reboot the system with kdump enabled, and make sure that the service is running (refer to Section 8.2, “Running Services” for more information on how to run a service in Fedora):

systemctl is-active kdump.service

Then type the following commands at a shell prompt:

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

This will force the Linux kernel to crash, and the address-YYYY-MM-DD-HH:MM:SS/vmcore file will be copied to the location you have selected in the configuration (that is, to /var/crash/ by default).