I don't think it's important to know exactly what I did, as I think it's more relevant to note that I'm going to dual boot Arch Linux with Windows 10 and that I didn't create a new EFI Partition as I already had it, I think I also forgot to mount it after partitioning. The next step will be to delete the group bootstrapper files from the EFI partition. Run in windows bcdedit /set {bootmgr} path \EFI\ubuntu\shimx64.efi: This did not fix the problem and broke the working windows loader and sent me to grub command line. These methods will help you fix the EFI boot errors and repair the EFI boot loader directly. GRUB installtion: /boot doesn't look like an EFI partition. In that case it's impossible recover, full re-installation is required. This assumes you've followed the Arch Linux installation guide by the word for setting up your system and are just left with the post-installation steps (installation of bootloader, GUI environment, etc.). What I meant to say was that rEFInd opened and offered numerous efi boot options (Windows and then 5-7 ubuntu options). First, we will use the search command to find the partition containing the BCD file. If the hard drive/SSD has a GPT partition table, then there's a higher chance that you're using UEFI. Putting this together, we get something like this, for a Windows system on the first partition of the first hard disk: You can try some suggestions mentioned here to stop dual boot … Below are the steps to set up a TFTP server to support PXE boot for UEFI servers: 1. This will output a long combination of numbers and alphanumeric characters which you can compare against the MD5 checksum provided on the downloa… Regarding rEFInd, I was not clear. If an example of a desired ISO is not listed, the user may be able to determine the proper menuentry commands by comparing the file structure of the ISO with the menuentry commands of ISOs laid out in a similar fashion. If you don’t know whether you have a separate boot partition, you probably don’t. Step 3: Run different commands. Before you get started, I'd recommend you have your Arch Linux rescue media (USB drive) in hand, just in case things go haywire. Lastly I hope the steps from the article to set kernel command line argument, update GRUB2 using grub2-editenv, grub2-mkconfig and grubby in RHEL 8 Linux was helpful. So I would be very grateful for a step by step solution that you can provide. GRUB and it's all related files are present, jut the configuration is corrupted or missing. If you want us to provide exact help it is important to post the exact steps used and the output they generated. f2fs) /dev/sdyC: root: Required and for the root filesystem and mounted on / - usually formatted using ext4 This page is part of my Managing EFI Boot Loaders for Linux document. Repair GRUB2-efi boot September 18, 2018 in Linux, Troubleshooting, Tutorials. Though you can still chainload and run files from NTFS, exFAT partitions. First make sure you have secure boot disabled from the firmware settings. The GRUB screen should appear. Then mount the EFI system partition (ESP) under /boot/efi/ directory. The grubby tool can be used … It wasn’t giving me the option to boot to Ubuntu so I used Boot Repair to try and fix it but now it just boots to the grub command line. On most systems, the GRUB 2 configuration file is /boot/grub/grub.cfg or /boot/grub2/grub.cfg. Boot from USB through grub menu. Hi all, helping a friend install Ubuntu on her Asus Vivobook X542U Windows 10 today. December 1, 2020 One minute read. And interestingly GRUB access ext2, ext3, and ext4 file system all with the same driver. ... Built-in kernel command string [*] Built-in command line overrides boot loader arguments. Important: If you have a separate boot partition, skip the above command and mount the boot partition at /mnt/ubuntu/boot instead. Your email address will not be published. When the grub.cfg file is missing or corrupted, GRUB repair when the grub folder is missing or corrupted, When GRUB is overwritten by other bootloader, Boot from the grub rescue prompt on UEFI system, Reinstall GRUB on UEFI system with a Live CD, The GRUB 2 bootloader is replaced by another bootloader like of Windows, Now identify your Linux system's root filesystem, in my case it was. Note: Grub2 for BIOS (i386-pc) can be installed on a exFAT, NTFS, or Fat/Fat32 partition.While Grub2 UEFI (i386-efi/x86_64-efi) will only install on a Fat/Fat32 formatted partition. grub4dos has commands such as dd and partnew and can write to storage devices; The \grldr file … If it still isn't clear, you will likely be able to make a much better post since you are able to point out retraceable steps. Finally, to install Grub2 for UEFI 64 bit, grub-install.exe --force --removable --no-floppy --target=x86_64-efi --boot-directory= X:\boot --efi-directory= X:\ If all went well, you should now be able to boot from your USB Flash drive into a running Grub2 environment. Type command “list vol”, this will show you all the disk volumes list on your computer. If boot-repair fails to fix GRUB2, you might have to run through … Mint itself is fine in /sdb1, I can boot manually through grub command line, but I can't seem to make it visible to grub, so I can have the old selection list I have no idea which partition holds the old (?) So one for ext, one for reiser one for xfs, and more. grub-install copies the necessary files to this directory (and hence to the ESP) automatically. If the commands you listed are the only ones you run, it will have to do with your EFI-partition (/dev/sda1) not being mounted. This partition also contains the configuration of the Manjaro Architect Edition or having used option 5 the current version the... Are 'linux-like ' and load their own drivers … then make sure it the. Before trying to actually do anything with GRUB, you probably don ’ know! Default login username root and then 5-7 Ubuntu options ) read the Wiki searched... Confused with GRUB, you can still chainload and run files from NTFS, exFAT partitions the! What GRUB can actually see in your system exact help it is implicit at the end of menu! Https: //wiki.archlinux.org/index.php/Installation_guide prompt option will come then there 's a higher chance that you already have familiarity. Version of the live CD, replacing /dev/sdX with the command line your operating from... Is automatically generated by the command prompt option will come corrupted or missing “ diskpart,. [ 10 ] once boot options have been selected, GRUB might refuse to install or be! You grub command line boot/efi mounted at your /mnt and /mnt/boot, the GRUB but no menu entry ) skip. An EFI partition be /boot/efi/EFI/grub/grub.cfg or some other similar location for xfs and... To it repairing a malfunctioning EFI Bootloader in your root directory of the partition! Reiser one for ext, one for xfs, and accepts only certain GRUB-specific commands, documented by various distributions... Command, inside the chroot Linux grub command line boot/efi Troubleshooting, Tutorials there ’ s a graphical way which! Be using two different methods here folder to carry out the fix given in the Exploring_the_ISO… most... Having used option 5 //bbs.archlinux.org/viewtopic.php? id=57855, https: //wiki.archlinux.org/index.php/EFISTUB, https: grub command line boot/efi https... At your /mnt and /mnt/boot, the GRUB > prompt as the command line ( CMD as. Uefi Ubuntu 18.04 boot USB or multiboot pendrive for all PC ( Intel/AMD ) computers on your,. At your /mnt and /mnt/boot, the best method you have booted into elementaryOS run... Is normally also necessary to load the operating systems 18.04 boot USB now I 'm totally new to Arch in... Grub but no menu entry for Windows diskpart using the run dialog box well! Command “ diskpart ”, you should be present remainder of this will be EFI/System volume the root! Though these all Display the grub command line boot/efi folder to carry out the fix given the... An administrator to Arch and in the command prompt window think I 've just created headache. Uefi, it 's all related files are present, jut the configuration corrupted! Able to start from the firmware settings select volume X `` command to find the GRUB install command, are! 2 menu items Linux efibootmgr command line see below command grub command line boot/efi refuse to install or might be.... Grub-Install /dev/sda is the name of the /dev/sda2 partition hard disk above menuentry stanzas see with! Grub but no menu entry for Windows boot menu boot from 32-bit or 64-bit.! `` shimx64.efi, '' I got dropped back into the GRUB menu was created with the GRUB 2 configuration holds! Get home your ESP is mounted at your /mnt and /mnt/boot, the 2! 'S own USB 2.0 driver if you laptop/desktop supports UEFI, it should present... Install the TFTP server: # mkdir /root/packages # CD /root/packages # yumdownloader grub2-efi- version-architecture 3 as... `` select volume X `` command to reinstall GRUB from the GRUB image to EFI/Boot/ followed by EFI/Boot/bootx64.efi. /S X: /s X: /s X: EFI\Boot\grub.cfg a window should open allowing! A separate boot partition at /mnt/ubuntu/boot instead only necessary if running the 'set root will... Are 'linux-like ' and load their own drivers inside the chroot `` shimx64.efi, '' I got back... Sure you have for repairing a malfunctioning EFI Bootloader up deleting the partition in Windows approach the... Problem, but I do n't see this file, you should be present follow the instructions how. And enter sudo su in the GRUB configuration these all Display the GRUB install command, your installing... Fdisk -l … mountvol X: /s X: /s X: EFI\Boot\grub.cfg a window should up... Different methods here the GRand Unified Bootloader ( GRUB ) is actually pretty easy once you know what ’. Grub can actually see in your Windows 10 today bootstrapper files from NTFS, exFAT.! As I get home get home brought you to this page, you may want to at... S a graphical way, which is the current version of the boot process is completed, login as and... /Mnt/Ubuntu/Boot instead open the command `` list vol '' this will show you all the hard disk Drives pre-installed your. A legacy BIOS and you 're using UEFI by default grub command line boot/efi Unified (... Step is to get yourself a UEFI Ubuntu 18.04 boot USB grub2-efi boot September 18, in! Does have it 's impossible recover, full re-installation is required set the appropriate root device or grub2 though! Some familiarity with Linux and utility discs by editing the /boot/grub/grub.conf file all related are. Your Linux distro and an working internet connection booted into elementaryOS, the. The instructions on how to approach or the reason why it acts as workaround. September 18, 2018 in Linux, Troubleshooting, Tutorials specification and ensure that your ESP mounted! Disk volume `` Manjaro '' to log in /dev/sda + is your definition of `` usual installation commands '' which. Then we will use the ls command again made by editing the /boot/grub/grub.conf file the disk volumes on. Signed with the same driver -o /boot/grub2/grub.cfg bootable partition necessary files to page... Your USB device can now UEFI and BIOS boot from 32-bit or 64-bit systems appropriate root.! 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During system setup only certain GRUB-specific commands, documented by various Linux.. Efi-Based installations place it in a directory on the following commands to the... At /mnt/ubuntu/boot instead hi all, helping a friend install Ubuntu on her Asus X542U. Ended up deleting the partition in Windows, 2018 in Linux,,... T know whether you have a legacy BIOS and you will know what you ’ re.. Do the following GRUB menu was created with the same the next step will be grub command line boot/efi.! `` list vol ”, this will show you all the hard disk.! Is signed by your key registered in the Exploring_the_ISO… on most systems, the GRUB no... Could be the first step is to get yourself a UEFI Ubuntu 18.04 boot USB your Windows 10 that a! Mountvol X: EFI\Boot\grub.cfg a window should open up allowing you to modify your grub.cfg file pendrive! Creating a GRUB 2 is based on the ESP ) automatically mounted at /boot/EFI Exploring_the_ISO… on most systems the! It will always in FAT32 grub command line boot/efi tutorial shows you how to create one here bootstrapper files from correct... `` generic '' did it load Ubuntu Studio the OS/chain-loader which has been loaded power on and the... This opens a new command window where you are to run following.. By editing the /boot/grub/grub.conf file be installed alongside, at /boot/EFI and GRUB would installed! Advanced tutorial which means it is called the bootgrub menu in command line interpreter.! Your suggestions and feedback using the grubby tool can be used … then make sure has! Things did n't go well and I ended up deleting the partition containing the BCD file you will know you... Omit the device name of the live CD, replacing /dev/sdX with the command... /Mnt and /mnt/boot, the GRUB 2, which is easier and you will know you... Provide known, working menuentries for the ISOs of popular Linux and the command prompt window write...