Re: Use the efi file created by grub-mkstandalone to boot isos from harddisk.

[Andrei Borzenkov]

On 08.07.2023 04:34, Hongyi Zhao wrote:
> Hi here,
>
> I want to boot isos from harddisk via the efi file created by
> grub-mkstandalone. The  efi file is generated as follows:
>
> $ grub-mkstandalone -O x86_64-efi -o grubx64.efi --modules='lvm fat
> ntfs part_msdos part_gpt ext2 btrfs probe regexp search configfile'
> boot/grub/grub.cfg=./boot/grub/grub.cfg
>
> Then I make the following directory layout based on the grubx64.efi
> created above:
>
> $ tree .
> .
> └── grub-mkstandalone
>      ├── boot
>      │   └── grub
>      │       └── grub.cfg
>      ├── grubx64.efi
>      └── iso
>          ├── deepin-desktop-community-23-Beta-amd64.iso
>          ├── rescatux-0.74.iso
>          ├── supergrub2-2.06s1-beta2-multiarch-CD.iso
>          ├── systemrescue-10.01-amd64.iso
>          ├── ubuntu-23.04-desktop-amd64.iso
>          └── ubuntukylin-23.04-desktop-amd64.iso
>
> I would like to know whether it's possible to make an appropriate
> grub.cfg in this case, which can scan all the isos automatically under
> the iso directory and generate the corresponding menu entries for me
> to boot them.

Yes, it is possible. You may look at supergrub which does more or less 
what you want.