> > > > I have only changed GRUB_DEFAULT from "saved" to "0" > > > > I have also run > > > > /usr/sbin/grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg > > I may be wrong here but IIRC, using grub2-mkconfig as described in the > Grub docs didn't work for me when I tried to use it years ago. > > I think you have to find out what is done when installing kernels and try > to find out where it goes wrong in your case. When you look at 'rpm -q > --scripts kernel' you can see that new kernels are registered with the > script '/usr/sbin/new-kernel-pkg'. I suggest to analyze what it does > exactly. I think it calls 'grubby' to do further work... > > Regards, > Simon > > If not already done, you can also go through the official documentation page for working with Grub 2 on RH EL 7 and the different commands it is reporting, both for bios and UEFU based systems.: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system_administrators_guide/ch-working_with_the_grub_2_boot_loader Eventually trying and managing before with some commands on another UEFI based system/vm that is more practical to use for you, as the target one is a remote system, as you wrote HIH, Gianluca