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...ze 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 ta...