Re: F28 server boots to the grub prompt even after dnf update and grub2-mkconfig

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On Tue, 2018-11-27 at 16:17 -0700, linux guy wrote:
> Interesting.  /boot/efi/EFI/fedora/grub.cfg didn't exist on my
> workstation.  But /etc/grub2-efi.cfg points to it !   /boot/efi
> existed, but it was empty.  

This means that either /boot/efi/ isn't mounted after you reboot (check
/etc/fstab) or your system isn't using EFI, but is using BIOS/MBR boot.

EFI needs /boot/efi/, and it needs to be FAT, not ext4 or xfs, so if
your system boots using EFI, there's a (usually +- 200MB) FAT partition
somewhere on a disk, with some data.

BIOS/MBR doesn't needs that.  Some EFI can boot in a legacy mode.


If you manually create /boot/efi/EFI/fedora/grub.cfg you likely created
a file on /boot, which is likely ext4, which the EFI bios won't load. 
Look for a FAT partition and mount that under /boot/efi/.  *Then* look
at grub.cfg.

(there need to be a few other files in /boot/efi/ too)

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