Grub

How to repair the GRUB bootloader using a Ubuntu Live USB drive

How to repair the GRUB bootloader using a Ubuntu Live USB drive

Resetting Grub Bootloader using a Ubuntu Live USB drive

  1. Try Ubuntu. ...
  2. Determine the Partition on Which Ubuntu is Installed Using fdisk. ...
  3. Determine the Partition on Which Ubuntu is Installed Using blkid. ...
  4. Mount The Partition with Ubuntu Installed On It. ...
  5. Restore Missing Grub Files Using the Grub Install Command.

  1. How do I repair restore reinstall GRUB 2 with Ubuntu live CD?
  2. How do I reinstall GRUB bootloader?
  3. How do I repair Grub loader?
  4. Is there a way to boot from USB through GRUB menu?
  5. How do I fix grub on USB?
  6. How do I fix a dual boot problem?
  7. How do I manually install grub?
  8. How do I enable GRUB bootloader?
  9. How do I remove GRUB bootloader?
  10. How do I install Boot Repair?
  11. What are the grub commands?
  12. How do I recover from grub rescue?

How do I repair restore reinstall GRUB 2 with Ubuntu live CD?

Run the following command to reinstall grub from the live CD, replacing /dev/sdX with the device name of the hard disk above. Omit the number. For example, if you used /dev/sda1 above, use /dev/sda here. Restart your computer and Ubuntu should boot properly.

How do I reinstall GRUB bootloader?

Reinstall the GRUB boot loader by following these steps:

  1. Place your SLES/SLED 10 CD 1 or DVD in the drive and boot up to the CD or DVD. ...
  2. Enter the command "fdisk -l". ...
  3. Enter the command "mount /dev/sda2 /mnt". ...
  4. Enter the command "grub-install --root-directory=/mnt /dev/sda".

How do I repair Grub loader?

The graphical way

  1. Insert your Ubuntu CD, reboot your computer and set it to boot from CD in the BIOS and boot into a live session. You can also use a LiveUSB if you have created one in the past.
  2. Install and run Boot-Repair.
  3. Click "Recommended Repair".
  4. Now reboot your system. The usual GRUB boot menu should appear.

Is there a way to boot from USB through GRUB menu?

Booting via GRUB

The easiest way to boot from a USB Drive is to boot via GRUB. To check if your BIOS is able to detect the USB drive and hand it over to GRUB, just run GRUB from your hard drive if it already installed, or from a GRUB boot floppy or CD. At the GRUB menu, hit the C key to enter command mode.

How do I fix grub on USB?

Resetting Grub Bootloader using a Ubuntu Live USB drive

  1. Try Ubuntu. ...
  2. Determine the Partition on Which Ubuntu is Installed Using fdisk. ...
  3. Determine the Partition on Which Ubuntu is Installed Using blkid. ...
  4. Mount The Partition with Ubuntu Installed On It. ...
  5. Restore Missing Grub Files Using the Grub Install Command.

How do I fix a dual boot problem?

Repair Windows 10 on a dual-boot system

  1. Insert the Windows 10 media and restart your computer to boot from the media.
  2. Go to Command Prompt (click Troubleshoot > Command Prompt)
  3. Type: bcdboot C:\windows. ...
  4. Press Enter.
  5. Remove the DVD or USB.
  6. Type: exit.
  7. Press Enter.
  8. Restart your computer.

How do I manually install grub?

1 Answer

  1. Boot the machine using a Live CD.
  2. Open a terminal.
  3. Find out the name of the internal disk by using fdisk to look up the device's size. ...
  4. Install GRUB boot loader onto the proper disk (the example below assumes it is /dev/sda ): sudo grub-install --recheck --no-floppy --root-directory=/ /dev/sda.

How do I enable GRUB bootloader?

1 Answer

  1. Boot into Ubuntu.
  2. Hold CTRL-ALT-T to open a terminal.
  3. Run: sudo update-grub2 and allow GRUB to update it's list of operating systems.
  4. Close Terminal.
  5. Restart Computer.

How do I remove GRUB bootloader?

Remove GRUB bootloader from Windows

  1. Step 1(optional): Use diskpart to clean disk. Format your Linux partition using Windows disk management tool. ...
  2. Step 2: Run Administrator Command Prompt. ...
  3. Step 3: Fix MBR bootsector from Windows 10.

How do I install Boot Repair?

By booting up your PC into Ubuntu / Debian via a live-CD or live-USB, then installing Boot-Repair in the live system, just launch Boot-Repair, then click the “Recommended repair” button will automatically detect the problems and recover access to your OSes.

What are the grub commands?

If you forget a command, you can run the command help (see help).

How do I recover from grub rescue?

Method 1 To Rescue Grub

  1. Type ls and hit enter.
  2. You will now see many partitions which are present on your PC. ...
  3. Assuming that you have installed distro in 2nd option, enter this command set prefix=(hd0,msdos1)/boot/grub (Tip: – if you don't remember the partition, try entering the command with every option.

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