How to edit Bootx64.efi?

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Here is an example if you want to reinstall grub:

Cannot boot Qubes after switching to UEFI boot

I had some troubles booting, and then using, Fedora from the Live USB, but I figured out how to fix the bootloader. Here’s the steps in case anyone finds this useful: On the old PC, start a terminal in an AppVM git clone https://github.com/livecd-tools/livecd-tools.git sudo make install Download a Fedora ISO image Plug a spare USB key into a USB port - ALL DATA ON IT WILL BE ERASED BELOW sudo livecd-iso-to-disk --efi --format ext4 --nomac ~/Downloads/Fedora-Workstation-Live-x86_64-35-1.2.iso …