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Siduction Forum => Software - Support => Topic started by: sotnik on 2020/02/15, 00:28:45

Title: Restore GRUB
Post by: sotnik on 2020/02/15, 00:28:45

I had to reinstall windows and it destroyed grub.
Where I can find a howto to restore grub without reinstalling siduction?
 

Title: Re: Restore GRUB
Post by: mdmarmer on 2020/02/15, 02:47:36

At the top of this webpage there is a link to the manual.  Navigate to System Administration, then GRUB2, then GRUB2-MBR overwritten.  A direct link is https://manual.siduction.org/sys-admin-grub2#mbr-over-grub2 (https://manual.siduction.org/sys-admin-grub2#mbr-over-grub2)


The instructions are very good.  You will need a siduction ISO (with another ISO you could use chroot as the manual also explains).

Title: Re: Restore GRUB
Post by: sunrat on 2020/02/15, 23:09:31

A simple way is to boot your current siduction install using the Boot Select menu at system startup and select siduction. It's F12 on my PCs but yours may be a different key. If that doesn't work, boot from a USB stick or CD containing REFInd bootloader (for UEFI systems). It will find and boot any kernels present and offer to boot them even if no bootloader exists.
Then do

Code: [Select]

grub-install
update-gruband reboot.
You didn't say whether you have UEFI or MBR system, which may be important to know.

Title: Re: Restore GRUB
Post by: piper on 2020/02/16, 16:44:01

I agree with what @sunrat says about UEFI or MBR, I don't own a UEFI board, but if MBR
Use a live siduction cd/stick and do the following, make sure you change sda10 accordingly  (If copy & pasting these commands, please understand what your doing)

Code: [Select]

==========
siduction
==========


mkdir -p /disks/sda10

mount /dev/sda10  /disks/sda10

/usr/sbin/grub-install --recheck --no-floppy --root-directory=/disks/sda10  /dev/sda


=======
debian
=======

mkdir -p /media/sda10

mount /dev/sda10  /media/sda10

/usr/sbin/grub-install --recheck --no-floppy --root-directory=/media/sda10  /dev/sda