Re: grub works, but boot menu is gone and has an error message. [corrected]

[Andrei Borzenkov]

On 22.02.2022 00:17, John Griessen wrote:
> 
> I've had this symptom for a while and cannot find much by searching for the 
> error message.
> 
> During boot, when the grub menu usually would come up, I see
> 
> error: can't find command 'exec' .

Show your /boot/grub/grub.cfg

> loading 5.11.0-46-lowlatency
> loading initramfs
> 
> 
> I think I got this when updating and deleting and reinstalling low level 
> ubuntu parts like busybox, syslinux, bash.
> 
> Any ideas what could be missing on my ubuntu 20.04 distro?
> Ordinary running of grub-install /dev/sda  says good and doesn't change the 
> symptom.
> 
> ll /sys/firmware/efi
> ls: cannot access '/sys/firmware/efi': No such file or directory
> 
> 
> sudo gdisk -l /dev/sda
> [sudo] password for john:
> GPT fdisk (gdisk) version 1.0.5
> 
> Partition table scan:
>    MBR: MBR only
>    BSD: not present
>    APM: not present
>    GPT: not present
> 
> 
> ***************************************************************
> Found invalid GPT and valid MBR; converting MBR to GPT format
> in memory.
> ***************************************************************
> 
> Disk /dev/sda: 500118192 sectors, 238.5 GiB
> Model: INTEL SSDSCKKF25
> Sector size (logical/physical): 512/512 bytes
> Disk identifier (GUID): 2178828C-D2B9-4B38-BA80-294C83D53164
> Partition table holds up to 128 entries
> Main partition table begins at sector 2 and ends at sector 33
> First usable sector is 34, last usable sector is 500118158
> Partitions will be aligned on 2048-sector boundaries
> Total free space is 19053 sectors (9.3 MiB)
> 
> Number  Start (sector)    End (sector)  Size       Code  Name
>     1            2048         1050623   512.0 MiB   0700  Microsoft basic data
>     5         1052672       475541503   226.3 GiB   8300  Linux filesystem
>     6       475543552       500105215   11.7 GiB    8200  Linux swap
> 
> 
> Thanks,