Hi > Sent: Sunday, July 04, 2021 at 12:01 PM > From: "David" <bouncingc...@gmail.com> > To: "debian-user mailing list" <debian-user@lists.debian.org> > Subject: Re: How do I get back the GRUB menu with the blue background? > > > As I mentioned, I do not know GPT and UEFI systems.
It's off-topic; I am curious why you do not use GPT/UEFI/Secure Boot? Secure Boot has been supported since Debian Buster. > However, I would expect that after you have successfully > discovered where grub finds the grub file directory, and the > kernel file and the initrd image, then it should be possible to > execute a manual sequence of commands at the grub prompt like: > > grub> insmod part_gpt > grub> insmod ext2 > grub> linux ... root= ... > grub> initrd ... > grub> boot > > That should boot into your installation. After that you will need to > run 'grub-install', see below. > > If the insmod commands fail, that can mean the value of > 'prefix' is incorrect. If you specify the full path that grub uses > to refer to each file, then it isn't necessary to specify 'root' > variable. > What did you mean by "prefix"? Would you like to elaborate? > Doing that, grub should attempt to boot the specified files, perhaps > giving further error messages as a clue to what might be > wrong. Did you try this method? > No, I didn't. > > Yes I am aware of that method which can succeed. However > I think you need to also run 'grub-install' in that situation to fix your > problem, because 'update-grub' merely regenerates a grub.cfg file > somewhere. > Thanks for your tip. I shall try it. > > You should check that target device and boot directory used > by 'grub-install' are correct. > How do I go about doing it? > Perhaps use -v and --boot-directory > options to make sure that 'grub-install' > does not reference anything inside your encrypted partition. > I don't know how to use the -v and --boot-directory options. Would you like to show me please? > > > Without seeing the commands, I don't know what this refers to > or why you would hold this view. > Sorry for the confusion. I looked up some Youtube video clips to see if they could provide me some tips on how to fix my issue.