Linuxteaching
- How do I update-grub on another drive?
- How do I fix grub on USB?
- How do I change GRUB bootloader?
- How do I rebuild grub?
- How do I manually install grub?
- How do I regenerate GRUB config?
- How do I fix grub error?
- How do I get grub boot menu?
- How do I fix Grub loader?
- How do I change Grub settings?
- How do you increase GRUB timeout?
- How do I remove grub boot options?
How do I update-grub on another drive?
To achieve this, you can use a Live CD, mount the relevant partitions from your hard disk, chroot into the mounted directory, and run update-grub, which should work as if you were operating on the actual hard disk. Boot with your Live CD, selecting "Try Ubuntu without installing".
How do I fix grub on USB?
Resetting Grub Bootloader using a Ubuntu Live USB drive
- Try Ubuntu. ...
- Determine the Partition on Which Ubuntu is Installed Using fdisk. ...
- Determine the Partition on Which Ubuntu is Installed Using blkid. ...
- Mount The Partition with Ubuntu Installed On It. ...
- Restore Missing Grub Files Using the Grub Install Command.
How do I change GRUB bootloader?
Once installed, search for Grub Customizer in the menu and open it.
- Start Grub Customizer.
- Select Windows Boot Manager and move it to the top.
- Once Windows is on the top, save your changes.
- Now you'll boot into Windows by default.
- Reduce the default boot time in Grub.
How do I rebuild grub?
Resolution
- Place your SLES/SLED 10 CD 1 or DVD in the drive and boot up to the CD or DVD. ...
- Enter the command "fdisk -l". ...
- Enter the command "mount /dev/sda2 /mnt". ...
- Enter the command "grub-install --root-directory=/mnt /dev/sda". ...
- Once this command completes successfully reboot your system by entering the command "reboot".
How do I manually install grub?
1 Answer
- Boot the machine using a Live CD.
- Open a terminal.
- Find out the name of the internal disk by using fdisk to look up the device's size. ...
- 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 regenerate GRUB config?
Rebuild the grub.cfg file by running the grub2-mkconfig -o command as follows:
- On BIOS-based machines, issue the following command as root : ~]# grub2-mkconfig -o /boot/grub2/grub.cfg.
- On UEFI-based machines, issue the following command as root : ~]# grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg.
How do I fix grub error?
How To Fix: error: no such partition grub rescue
- Step 1: Know you root partition. Boot from live CD, DVD or USB drive. ...
- Step 2: Mount the root partition. ...
- Step 3: Be the CHROOT. ...
- Step 4: Purge Grub 2 packages. ...
- Step 5: Re-install Grub packages. ...
- Step 6: Unmount the partition:
How do I get grub boot 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 fix Grub loader?
The graphical way
- 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.
- Install and run Boot-Repair.
- Click "Recommended Repair".
- Now reboot your system. The usual GRUB boot menu should appear.
How do I change Grub settings?
It's automatically created by running the update-grub command as root — in other words, by running sudo update-grub on Ubuntu. Your own GRUB settings are stored in the /etc/default/grub file. Edit this file to change GRUB2's settings. Scripts are also located in the /etc/grub.
How do you increase GRUB timeout?
Just follow these steps.
- Open file system.
- Open /etc folder.
- Open default folder.
- Find grub file and open it with leafpad (or any other text editor).
- Set GRUB_TIMEOUT to your need and save it.
- Now open terminal and type update-grub .
- Reboot your system.
How do I remove grub boot options?
Step 2: Scan through the list to locate the Grub entry you're looking to get rid of. When you've found it, right-click on it to open up the right-click menu. Step 3: Look through the right-click menu for the “Remove” button to instantly delete the menu entry from your Grub bootloader list.
