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Topic: how doI re-install grub2 (Read 714 times)

bootflag
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how doI re-install grub2
« Thread Started on Apr 8, 2011, 9:45pm »

I want to dual boot with another boot loader, but need to install saline grub to its own partition. It is currently installed to the MBR.

They way I remember is

Code:
sudo grub-install /dev/sda3

but that doesn't work with grub2.

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Re: how doI re-install grub2
« Reply #1 on Apr 8, 2011, 10:36pm »

6. Reinstall grub 2: (mount root-directory if not mounted) [# update-grub afterwards]
# mkdir /mnt/sda1 && mount /dev/sda1 /mnt/sda1 # replace sda1 with your partition nº
# grub-install --root-directory=/mnt/sda1 /dev/sda
OR =/ /dev/sda if installing to the active distro.

or use chroot:
# mount --bind /proc /mnt/sda1/proc
# mount --bind /dev /mnt/sda1/dev
# mount --bind /sys /mnt/sda1/sys
# chroot /mnt/sda1
# update-grub
# umount /mnt/sda1/sys && umount /mnt/sda1/dev && umount /mnt/sda1/proc

Never used the chroot much but the grub-install works fine.

« Last Edit: Apr 8, 2011, 10:38pm by Richard »

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Re: how doI re-install grub2
« Reply #2 on Apr 8, 2011, 11:19pm »

Thanks Richard. I got an "Installation successful" output, using the first method.

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Anthony Nordquist
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Re: how doI re-install grub2
« Reply #3 on Apr 9, 2011, 3:50am »

I would like to add for anyone who comes across this, that the easiest way to install grub2 to root is to use the Remastersys Grub Restore under Applications > System. It basically does all the above for you, this is the same method the installer uses to install Grub2 in the first place.

« Last Edit: Apr 9, 2011, 3:51am by Anthony Nordquist »

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Re: how doI re-install grub2
« Reply #4 on Apr 11, 2011, 4:00pm »

Quote:

I strongly recommend using the remastersys grub restore, when anyone has a grub problem, being a distro tester, I tend to test every single distro I see on distrowatch and as you have guess I mess my grub a lot sometimes I do it on purpose and sometimes the installers don't do what I tell them to do, and when that happens I just boot my salineos remaster and fix it with it.
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Re: how doI re-install grub2
« Reply #5 on Apr 13, 2011, 1:02pm »

http://www.youtube.com/watch?v=gl8mfpZuDiM&feature=related

« Last Edit: Apr 13, 2011, 1:03pm by murdock »

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Anthony Nordquist
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Re: how doI re-install grub2
« Reply #6 on Apr 13, 2011, 1:32pm »

That video is well worth watching, though you should use the Remastersys grub restore utility to fix your grub install with SalineOS.

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