When the GRUB screen appear, press C or ESC to go to the GRUB console. If you have your bootable USB drive, insert it into the computer. If not, you can use a tool called Unetbootin to create a bootable USB drive. I assume that you already have a bootable USB drive with your favorite Linux distro.
#Grub4dos boot loader how to
I had an opportunity to learn how to boot from USB using GRUB. Moreover, ever since I installed GRUB, the shortcut to summon booting device selection stopped working. I prepared a USB stick with the new system, but I couldn’t boot from it – BIOS was restoring the booting order on every reboot. I use it from time to time, but one day the filesystem crashed, and even fsck couldn’t repair it. One of my old computers runs Linux with GRUB as a bootloader. But what if both options failed for some reason? If not, there is an option in BIOS/UEFI to change that. Įdited by generalmx, 28 March 2016 - 01:40 AM.Almost every modern computer has a dedicated menu to choose from which device the system should boot. from GRUB2 UEFI Boot Loader.Įcho ** Switching to other/unknown EFI Boot Loader for. Įcho ** Switching to REFIND EFI Boot Loader for. from unknown/other EFI Boot Loader.Įcho ** Switching to GRUB2 UEFI Boot Loader for. REM Figure out which boot loader is boot.efi by missing filesĮcho **.
#Grub4dos boot loader windows
"%BOOTICE%" /device=%~d0 /mbr /restore /file="%_PREVMBR%" /quiet & "%BOOTICE%" /device=%~d0 /pbr /restore /file="%_PREVPBR%" /quiet & del /f "%_PREVMBR%" & del /f "%_PREVPBR%"Įcho ** Switching to Windows UEFI Boot Loader. "%BOOTICE%" /device=%~d0 /mbr /backup /file="%_PREVMBR%" /quiet & "%BOOTICE%" /device=%~d0 /pbr /backup /file="%_PREVPBR%" /quiet & "%BOOTICE%" /device=%~d0 /mbr /install /type=nt60 /quiet & "%BOOTICE%" /device=%~d0 /pbr /install /type=bootmgr /quietĮcho ** Restoring previous boot loader to MBR and PBR for. IF EXIST "%_OTHEREFI%" IF = GOTO :otherefiĮcho ** Installing Windows Boot Loader to MBR and PBR for. IF EXIST "%_REFEFI%" IF = GOTO :refindefi Switch to Windows UEFI Boot LoaderĮcho 3. Restore previous non-Windows boot loader Įcho 1. IF /I = (Įcho Warning: BOOTICE not detected. REM Switch between different boot loaders. If not exist /efi/boot/REFX64.EFI echo OK, reFIND UEFI Boot Loader setĪccompanying Windows batch file to switch without loading grub4dos, requires BOOTICE if you also want to support saving & restoring the MBR & PBR off
![grub4dos boot loader grub4dos boot loader](https://flylib.com/books/1/359/1/html/2/images/fig195_01.jpg)
If exist /efi/boot/BOOTX64.EFI if not exist /efi/boot/GRUBX64.EFI fat ren /efi/boot/BOOTX64.EFI /efi/boot/GRUBX64.EFIįat ren /efi/boot/REFX64.EFI /efi/boot/BOOTX64.EFI Iftitle Switch to reFIND UEFI Boot Loader (EFI Multiboot)
![grub4dos boot loader grub4dos boot loader](https://i.stack.imgur.com/Db5MK.png)
If not exist /efi/boot/GRUBX64.EFI echo OK, Grub2 UEFI Boot Loader set If not exist /efi/boot/WINX64.EFI fat ren /efi/boot/BOOTX64.EFI /efi/boot/WINX64.EFIįat ren /efi/boot/GRUBX64.EFI /efi/boot/BOOTX64.EFI Iftitle Switch to Grub2 UEFI Boot Loader (Memtest, Linux, etc.) If not exist /efi/boot/WINX64.EFI echo OK, Windows UEFI Boot Loader set If exist /efi/boot/BOOTX64.EFI if not exist /efi/boot/REFX64.EFI fat ren /efi/boot/BOOTX64.EFI /efi/boot/REFX64.EFIįat ren /efi/boot/WINX64.EFI /efi/boot/BOOTX64.EFI If not exist /efi/boot/GRUBX64.EFI fat ren /efi/boot/BOOTX64.EFI /efi/boot/GRUBX64.EFI Iftitle Switch to Windows UEFI Boot Loader This script assumes one of these is currently renamed to BOOTX64.EFI, but can work without BOOTX64.EFI even existing. REFX64.EFI - reFIND EFI Boot Loader that's not currently activeīOOTX64.EFI - Currently active 64-bit UEFI/EFI Boot Loader GRUBX64.EFI - Grub2 UEFI Boot Loader that's not currently active WINX64.EFI - Windows UEFI Boot Loader that's not currently active These scripts make it easier to use something like Easy2Boot for all your BIOS booting needs while keeping loose files for your UEFI/EFI booting, as long as they can boot from the same filesystem. I posted this a while ago in a different thread but as I still find it useful I thought I'd post both scripts together.