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 skip grub in rescue mode?
8. How do I get rid of grub rescue mode?
9. How do I boot from GRUB command line?
10. How do I repair Ubuntu?
11. How do I manually install grub?
12. How do I edit 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 skip grub in rescue mode?

Now select type (in my case GRUB 2), select name (whatever you want, the given name will be displayed at boot menu) and now select your drive in which Linux is installed. After then click "add entry", now select "BCD Deployment" option , and click on "write MBR" to delete GRUB Boot loader, and now restart.

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 boot from GRUB command line?

There is probably a command that I can type to boot from that prompt, but I don't know it. What works is to reboot using Ctrl+Alt+Del, then pressing F12 repeatedly until the normal GRUB menu appears. Using this technique, it always loads the menu. Rebooting without pressing F12 always reboots in command line mode.

How do I repair 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 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 edit grub menu?

When the boot sequence begins, the GRUB main menu is displayed. Use the arrow keys to select the boot entry to edit, then type e to access the GRUB edit menu. Use the arrow keys to select the kernel or kernel$ line in this menu. Type e to add boot arguments to the line.