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I have a dual boot Windows 10 + Ubuntu 18.04, I wanted to install Centos 7 which I did. That broke my Ubuntu boot!

  • I deleted Centos 7 (partitions), deleted /boot/efi/EFI/centos folder
    • /boot is in a different partition
  • Ran grub-mkconfig -O /boot/grub/grub.cfg
  • It keeps generating using linux, initrd instead of linuxefi, initrdefi.

Why?

FYI, my secure boot is disabled in the bios.

I'd like to just delete the whole /boot/efi partition and reinstall grub and the config. Is that possible? How about windows 10's boot? I wish grub's information was much cleaner, it's so confusing.

Sources: * Modify GRUB permanently

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