Difference between revisions of "Grub"
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| − | = | + | GRUB is the '''gr'''ant 'u'nified 'b'ootloader, in use by most Linux distributions, e.g. Ubuntu and SUSE. You may probably want to print this page because if the bootloader is broken, there is no chance to get into the system for repair instructions, you will need to have a printout. |
| − | grub | + | |
| + | = grub's command line = | ||
| + | grub> kernel /boot/vmlinuz | ||
| + | grub> initrd /boot/initrd | ||
| + | grub> boot | ||
= repair grub = | = repair grub = | ||
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$ chroot /media/hda3 | $ chroot /media/hda3 | ||
$ grub-install /dev/hda | $ grub-install /dev/hda | ||
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| + | = reinstall grub = | ||
| + | grub-install --recheck --no-floppy --root-directory=/path/to/root /dev/hda | ||
= determine entry to be booted next time = | = determine entry to be booted next time = | ||
grub-reboot ''entry-number'' | grub-reboot ''entry-number'' | ||
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= backup partition table = | = backup partition table = | ||
Revision as of 19:40, 29 December 2011
GRUB is the grant 'u'nified 'b'ootloader, in use by most Linux distributions, e.g. Ubuntu and SUSE. You may probably want to print this page because if the bootloader is broken, there is no chance to get into the system for repair instructions, you will need to have a printout.
Contents
grub's command line
grub> kernel /boot/vmlinuz grub> initrd /boot/initrd grub> boot
repair grub
Boot from Knoppix,
$ mount /dev/hda3 /media/hda3 $ mount --bind /dev /media/hda3/dev $ mount --bind /proc /media/hda3/proc $ chroot /media/hda3 $ grub-install /dev/hda
reinstall grub
grub-install --recheck --no-floppy --root-directory=/path/to/root /dev/hda
determine entry to be booted next time
grub-reboot entry-number
backup partition table
To backup your partition table:
sfdisk -d /dev/hda > hda.pt
To restore it:
sfdisk /dev/hda < hda.pt
