efibootmgr VS Grub2Win

When I use the command line tool efibootmgr to modify the UEFI's boot entries, it fails with Could not prepare Boot variable: No space left on device. But I am not sure which device efibootmgr thinks is full; sda1 has plenty of space and is mounted writeable; it seems to be something directly by the BIOS? -- The same message appears when I want to reorder Bootnums, but the reordering still is carried out. Source: 11 months ago

Efibootmgr wiki Use this reference to change boot order if you so choose. Reboot into bios and you should see your windows install as an option to boot. Source: over 1 year ago

So I updated the install script to use efibootmgr to change the boot order. It's updated from the looks of things, but the CDROM still boots. Even when I use it to delete boot entries, it continues to kick the Live CD. When I change the EFI boot order manually in the vSphere client or disable entries, it will boot the installed Arch Linux. Source: almost 2 years ago

Assuming you are using EFI you can use https://github.com/rhboot/efibootmgr to change your boot order. This will bypass GRUB. I would create a bash alias to change the next boot device and then restart the computer so you can have everything happen with one command. Source: over 2 years ago

Check if this is in the repo. Https://github.com/rhboot/efibootmgr. Source: about 3 years ago

Use https://sourceforge.net/projects/grub2win/ to manage dual (multiboot) from Windows , makes yput life easyer. If you have more than one disk instal Linux on a separate one if not you need to create a separate partition. When you install Linux if you have 2 drives make sure that Linux grub (bootloader) is installed on the drive wher Linux resides, not on the one where Windows and it's bootloader is, in case you... Source: about 1 year ago

Otherwise, what you'll have to do is image a USB drive with a partition management software or distro (e.g. GParted Live), boot from it, and then resize your partition from there. This does carry more risk of data loss than the dual SSD method, but it's more universal (you haven't mentioned if this is a laptop with more than one removable storage option or not, for instance), and it's unlikely to cause any harm.... Source: over 1 year ago

I have a suggestion, follow the previously advised installation process to install CrOS Flex on a separate drive, then reconnect and enable the Windows disk through the boot menu, once back there you can install a GRUB manager under Windows, like Grun2Win, it's easy to install and set up, once you are all done, the final result will be easier to switch from one OS to the next, instead of every time going through... Source: almost 2 years ago

When using Opencore for booting Windows 10, causes many issues. Even it causes issues when you boot MacOS after restarting from Windows 10. So Fix is Simple Use Grub2win as main bootloader and boot Windows or Opencore ( Chainload opencore efi file) from there. I am available for your queries and help. Source: over 2 years ago

However, I have used this https://sourceforge.net/projects/grub2win/ I install it on the windows side and configure it. It will enable me to choose ubuntu> Ater booting in Ubuntu, I do grub install. If that's too complicated to install grub repair when you boot into Ubuntu and run it. Source: almost 3 years ago