- INSTALL GRUB ON USB FROM WINDOWS HOW TO
- INSTALL GRUB ON USB FROM WINDOWS INSTALL
- INSTALL GRUB ON USB FROM WINDOWS UPDATE
Generate the main configuration file /boot/grub/grub.cfg: # update-grub
INSTALL GRUB ON USB FROM WINDOWS UPDATE
Optionally, you may want to update a GRUB’s configuration (for example, if the system was not booting properly due to some incorrect modifications you made in the /etc/default/grub file earlier – this is a time to fix them): # vi /etc/default/grubĪs an example you can take a GRUB’s default configuration file locate here: # cat /usr/share/grub/default/grub Grub-install: warning: EFI variables are not supported on this system.
INSTALL GRUB ON USB FROM WINDOWS INSTALL
Install GRUB on the primary disk drive (in our case it is /dev/sda): # grub-install /dev/sdaįile descriptor 4 (/dev/sda1) leaked on vgs invocation. Mount the UEFI partition: # mount /dev/sda1 /mnt/boot/efiīind the directories required by the grub-install and update-grub commands: # for i in /dev /dev/pts /proc /sys /run do mount -B $i /mnt$i doneĬhroot into a broken system: # chroot /mnt Loop0 7:0 0 679.8M 1 loop /run/archiso/sfs/airootfs Mount a “ root” LVM partition: # mount /dev/vgubuntu/root /mntįind out a name of the UEFI system partition (the first partition of a primary disk drive, i.e. The folder will be present if your system is using UEFI.īoot from the rescue media (this can be a special SystemRescue USB stick or a simple live USB with Ubuntu or Linux Mint or any other system with a Linux shell prompt).ĪCTIVE '/dev/vgubuntu/root' inheritĪCTIVE '/dev/vgubuntu/swap_1' inherit UEFI or BIOS? The easiest way to find out if the system has booted in UEFI or BIOS mode is to look for a folder /sys/firmware/efi.
INSTALL GRUB ON USB FROM WINDOWS HOW TO
I have tested this GRUB reinstallation on Ubuntu Linux, though all of the commands below should work for the other Linux systems as well.Ĭool Tip: How to create a Linux rescue USB stick! Read more → Reinstall GRUB from Live USB In this note i am describing a particular case of how to repair GRUB by reinstalling it from a live USB if a broken system is configured to boot in UEFI mode and a system’s disk is partitioned to LVM.
There are many reasons why you may need to reinstall GRUB: corrupted boot partition GRUB got overridden after Windows installation some unsupported Linux kernel parameters have been set in a GRUB configuration file and the system is not booting anymore but this can’t be fixed from a GRUB menu as it is not showing up, etc.
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