[SOLVED] How to restore dual boot

[ell]

I over wrote my windows 10 partition with a new creators update tib image in my dual boot ubuntu/windows10 system and now I can't get the dual boot option back. The ubuntu partition is still intact with the swap file partition. I'm a novice with ubuntu can't seem to get it figured out, googled my head off, tried easybcd too but fail. Anybody?

 

[backwoodsman]

I use Rescatux for that. I've never used it on a UEFI disk, but it's supposed to work.

https://www.supergrubdisk.org/rescatux/

 

[ell]

I tried rescatux on usb and it worked to get me into ubuntu, so I knew it was fine, but couldn't figure out how to get in without the usb. Did more googling and found a linux app "Boot-Repair" I used rufus and installed the iso to usb, booted from it and bam, worked.

 

[NJW]

I tried rescatux on usb and it worked to get me into ubuntu, so I knew it was fine, but couldn't figure out how to get in without the usb.

Having got into Ubuntu, simply updating grub should have been enough.

Or a quick Google will bring up the Ubuntu community help topic.

 

[ell]

Having got into Ubuntu, simply updating grub should have been enough.

Or a quick Google will bring up the Ubuntu community help topic.

Wasn't until I used rescatux that I could even get into ubuntu, booting from a live cd didn't work, the commands did nothing. I'm sure it was operator error, I such a novice with linux.

 

[LordIntruder]

I'm sure it was operator error, I such a novice with linux.

You're right
Windows kills the bootloader Linux installed when Windows is installed or feature-upgraded after you installed linux and wrote the bootsector. There are not only one way to get grub reinstalled in the boot sector. The short way:
boot from a live cd
open a console
become root

mkdir /tmp/mnt
mount /dev/sdx /tmp/mnt #(sdx is the partition your ubuntu is installed to)
chroot /tmp/mnt /bin/bash
update-grub
exit #(as often as needed to close the console window)

reboot the machine

 

[ell]

You're right
Windows kills the bootloader Linux installed when Windows is installed or feature-upgraded after you installed linux and wrote the bootsector. There are not only one way to get grub reinstalled in the boot sector. The short way:
boot from a live cd
open a console
become root

mkdir /tmp/mnt
mount /dev/sdx /tmp/mnt #(sdx is the partition your ubuntu is installed to)
chroot /tmp/mnt /bin/bash
update-grub
exit #(as often as needed to close the console window)

reboot the machine

I was doing something wrong. I know its not that tough, but every command I ran, like
sudo grub-install /dev/xxx from ubuntu live cd said command was not found.

 

[LordIntruder]

re-read my post carefully, please. And let us participate in what you exactly did from the beginning to the moment where you began to struggle.

 

[ell]

re-read my post carefully, please. And let us participate in what you exactly did from the beginning to the moment where you began to struggle.

I have no idea now, I was multitasking between it and a troublesome mac. Thanks though, I don't plan on updating my dual boot bench pc again for quite a while.

 

[LordIntruder]

multitasking between two things when one thing isn't quite routine is a bad idea.

I don't plan on updating my dual boot bench pc again for quite a while

That's your point of view. Maybe M$ has a different view on the things
anyway, if you have questions just ask.