Hello, John, My guess is that some part of the EFI setup is missing.
I found a nice explanation but it is Fedora based: https://www.dedoimedo.com/computers/grub2-fedora-command-not-found.html In the solution part, as you are using Ubuntu, replace "dnf" with "sudo apt" and "<os>" with "ubuntu" so the commands would be: sudo apt install grub2-efi-modules grub2-mkconfig -o /boot/grub2/grub.cfg grub2-mkconfig -o /boot/efi/EFI/ubuntu/grub.cfg This is just my guess. Regards, Josep Missatge de John Griessen <[email protected]> del dia dl., 21 de febr. 2022 a les 22:18: > > 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' . > 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, > -- > John > >
