sudo rpm -qa kernel*
sudo ls -l /boot/vmlinuz* #list all kernel partitions directory for booting
sudo grubby --default-kernel #show defauld boot kernel
sudo uname -r #show current boot kernel
grubby --set-default /boot/vmlinuz-5.4.17-2136.308.9.el8uek.x86_64.debug
grubby --info=ALL
reboot
sudo ls -l /boot/vmlinuz* #list all kernel partitions directory for booting
sudo grubby --default-kernel #show defauld boot kernel
sudo uname -r #show current boot kernel
grubby --set-default /boot/vmlinuz-5.4.17-2136.308.9.el8uek.x86_64.debug
grubby --info=ALL
reboot