A question regarding grub involving updates

[Bret Busby]

On 21/11/2022 15:30, Bret Busby wrote:
> Hello.
> 
> In having just performed an upgrade (apt full-upgrade), which involved 
> some grub updates/upgrades, the output involved the following.
> 
> "
> Setting up kpartx (0.8.8-1ubuntu1.22.04.1) ...
> Setting up grub-efi-amd64-bin (2.06-2ubuntu10) ...
> Setting up kpartx-boot (0.8.8-1ubuntu1.22.04.1) ...
> update-initramfs: deferring update (trigger activated)
> Setting up gir1.2-webkit2-4.0:amd64 (2.38.2-0ubuntu0.22.04.2) ...
> Setting up grub-efi-amd64-signed (1.182~22.04.1+2.06-2ubuntu10) ...
> Trying to migrate /boot/efi into esp config
> Installing grub to /boot/efi.
> Installing for x86_64-efi platform.
> grub-install: warning: EFI variables cannot be set on this system.
> grub-install: warning: You will have to complete the GRUB setup manually.
> Installation finished. No error reported.
> Processing triggers for man-db (2.10.2-1) ...
> Processing triggers for libc-bin (2.35-0ubuntu3.1) ...
> Processing triggers for initramfs-tools (0.140ubuntu13) ...
> update-initramfs: Generating /boot/initrd.img-5.15.0-53-generic
> I: The initramfs will attempt to resume from /dev/sda6
> I: (UUID=48b30053-cf4a-4d17-a988-dcc123b6750b)
> I: Set the RESUME variable to override this.
> "
> 
> So, I ran (well, it didn't, as shown)
> "
> root at bret-OptiPlex-9030-AIO:~# grub-update
> grub-update: command not found
> root at bret-OptiPlex-9030-AIO:~# man grub
> No manual entry for grub
> "
> 
> So, I searched in synaptic, for grub, to find how to update it, and 
> found the package
> update-grub
> and lots of other grub associated packages.
> 
> But, what I am wondering, with also having found, in that search,
> 
> refind;
> "
> boot manager for EFI-based computers
> 
> A graphical boot manager for EFI- and UEFI-based computers, such as all
> Intel-based Macs and recent (most 2011 and later) PCs. rEFInd presents a
> boot menu showing all the EFI boot loaders on the EFI-accessible
> partitions, and optionally BIOS-bootable partitions on Macs and BIOS boot
> entries on UEFI PCs with CSMs. EFI-compatible OSes, including Linux,
> provide boot loaders that rEFInd can detect and launch. rEFInd can launch
> Linux EFI boot loaders such as ELILO, GRUB Legacy, GRUB 2, and 3.3.0 and
> later kernels with EFI stub support. EFI filesystem drivers for ext2/3/4fs,
> ReiserFS, Btrfs, NTFS, HFS+, and ISO-9660 enable rEFInd to read boot
> loaders from these filesystems, too. rEFInd's ability to detect boot
> loaders at runtime makes it very easy to use, particularly when paired with
> Linux kernels that provide EFI stub support.
> "
> 
> in the context of the output from the system upgrade, should I run 
> update-grub (assuming that that would do what is required), or, should I 
> be installing and using refind?
> 
> I believe that I have been using GRUB as the bootloader, for as long as 
> I can remember having dual and multiple boot systems - there may have 
> been something else, about 25 years ago, but I do not remember what.
> 
> Thank you in anticipation.
> 
> ..
> Bret Busby
> Armadale
> Western Australia
> (UTC+0800)
> .................
> 
I have just remembered - before grub, I used lilo, and I do not remember 
how many years ago, I switched (or, was switched) to grub.

..
Bret Busby
Armadale
West Australia
(UTC+0800)
..............