How To Restore Grub In Ubuntu

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.

1. How do I restore grub?
2. How do I fix grub error?
3. How do I repair restore reinstall GRUB 2 with Ubuntu live CD?
4. How do I regenerate GRUB config?
5. How do I enable GRUB menu?
6. How do I reinstall grub from USB?
7. How do I fix grub error in Ubuntu?
8. How do I get rid of grub rescue mode?
9. How do I skip grub boot menu?
10. How do I reinstall Ubuntu?
11. How do I manually install grub?
12. How do I update grub menu?

How do I restore grub?

Resolution

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". ...
5. Once this command completes successfully reboot your system by entering the command "reboot".

How do I fix grub error?

How To Fix: error: no such partition grub rescue

1. Step 1: Know you root partition. Boot from live CD, DVD or USB drive. ...
2. Step 2: Mount the root partition. ...
3. Step 3: Be the CHROOT. ...
4. Step 4: Purge Grub 2 packages. ...
5. Step 5: Re-install Grub packages. ...
6. Step 6: Unmount the partition:

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 regenerate GRUB config?

Rebuild the grub.cfg file by running the grub2-mkconfig -o command as follows:

1. On BIOS-based machines, issue the following command as root : ~]# grub2-mkconfig -o /boot/grub2/grub.cfg.
2. On UEFI-based machines, issue the following command as root : ~]# grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg.

How do I enable GRUB menu?

With BIOS, quickly press and hold the Shift key, which will bring up the GNU GRUB menu. (If you see the Ubuntu logo, you've missed the point where you can enter the GRUB menu.) With UEFI press (perhaps several times) the Escape key to get grub menu.

How do I reinstall grub from 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 grub error in Ubuntu?

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.

How do I get rid of grub rescue mode?

In the System Recovery Options dialog box, click Command Prompt. Once in the command prompt, type exactly Bootrec.exe /FixMbr and then press ENTER . You will see "operation completed successfully." (Doesn't even take a second. Don't be alarmed )

How do I skip grub boot menu?

Run grub-set-default 0 to ensure you boot into Ubuntu by default. See Grub2 Setup in the Ubuntu community documentation for more information. When you're done, run sudo update-grub to save your changes.

How do I reinstall Ubuntu?

Here are the steps to follow for reinstalling Ubuntu.

1. Step 1: Create a live USB. First, download Ubuntu from its website. You can download whichever Ubuntu version you want to use. Download Ubuntu. ...
2. Step 2: Reinstall Ubuntu. Once you have got the live USB of Ubuntu, plugin the USB. Reboot your system.

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 update grub menu?

Phase 1 - Note: don't use a Live CD.

1. In your Ubuntu open a terminal (press Ctrl + Alt + T at the same time)
2. Make the changes you would like to make and save them.
3. Close gedit. Your terminal should still be open.
4. In the terminal type sudo update-grub , wait for the update to finish.
5. Reboot your computer.