#若出错grub-install: warning: EFI variables cannot be set on this system #检查当前启动模式 ls /sys/firmware/efi

#进入chroot前挂载

for i in /dev /dev/pts /proc /sys /run; do sudo mount –rbind $i /mnt$i; done

sudo mount -t efivarfs efivarfs /mnt/sys/firmware/efi/efivars #chroot后 apt install grub-efi-amd64 grub-install –target=x86_64-efi –efi-directory=/boot/efi –bootloader-id=debian –recheck /dev/sda update-grub