On Fri, 20 Feb 2015 16:26:03 +0800 Bret Busby <bret.bu...@gmail.com> wrote:
> On 20/02/2015, Bret Busby <bret.bu...@gmail.com> wrote: > > On 20/02/2015, Bob Proulx <b...@proulx.com> wrote: > >> Bret Busby wrote: > >>> The Debian 7.60 LXDE LiveCD does not have an option to boot into > >>> rescue mode. > >> > >> You could always download the standard debian-installer and use > >> that to boot rescue mode. It is a very good option. > >> > >> However if you have a livecd and you say you do then that should be > >> enough to do what you need. Simply chroot into your system and > >> then use it to repair your bootloader. > >> > >> The basic process goes like this. > >> > >> * Boot a livecd image. > >> * Mount the target system to repair. > >> > >> mkdir /target > >> mount /dev/sda5 /target > >> mount /dev/sda1 /target/boot > >> chroot /target /bin/bash > >> grub-install /dev/sda > >> exit > >> shutdown -r now > >> > >> You will need to adapt it to your system environment. Your device > >> paths will be uniquely yours. This is just an example of the > >> overall process to give you the idea of the flow. The chroot > >> stacks a shell logged into the target environment. Once inside > >> that environment then you have access to the system commands to > >> repair grub. You can apt-get install additional software. You > >> can fix things. > >> > >> Bob > >> > > > > Hello. > > > > I had found a LiveCD rescue iso, and had tried to load that, in case > > that would take me to a "restore grub" menu option, but that booted > > into a command line, that showed that fdisk was not available, and > > chroot was not available, so I tried to shut the system down, by > > using <CTRL><ALT><DEL>, and that let me retrieve the DVD, and I was > > going to try booting using an install disk iso, but, it booted into > > the botched PC-BSD thing, and, holding down the <ESC> key, got me a > > screen that had at the bottom, > > "Press enter to boot the selected OS" (the botched PC-BSD, that > > simply fails, was the only OS displayed as an option)" > > " "e' to edit the commands before booting" - meaningless to me > > "or "c' for a command line" > > so I pressed "C", hoping to be able to use a "shutdown" command, so > > that I could boot another computer, so as to download and write a > > current install Debian iso image, and, when I pressed the "c", I > > got a window that appeared, that is a GRUB thing, with the > > "grub>" prompt. > > > > So, now, this has evovled to the new question; what do I type in at > > the GRUB prompt, to make it search for, and, offer as boot options, > > the pre-existing, installed, Ubuntu and Debian installations? > > > > > > > > -- > > Bret Busby > > Armadale > > West Australia > > .............. > > > > "So once you do know what the question actually is, > > you'll know what the answer means." > > - Deep Thought, > > Chapter 28 of Book 1 of > > "The Hitchhiker's Guide to the Galaxy: > > A Trilogy In Four Parts", > > written by Douglas Adams, > > published by Pan Books, 1992 > > > > .................................................... > > > > I have searched and found > http://www.linux.com/learn/tutorials/776643-how-to-rescue-a-non-booting-grub-2-on-linux/ > > and have done ls, that shows 13 GPT partitions, of which, I know (or > believe) that 3 are operating system installations partitions, so I > apparently need to do an ls on each partition, to find which are the > operating system partitions, then, I believe, enable one of the Linux > partitions, using GRUB, then, boot into that partition, then, run, as > root (so it would need to be the Debian partition, I think), > # update-grub > which would, I hope, restore GRUB as the multiple OS bootloader. > > Also, have you looked at this: http://sourceforge.net/projects/boot-repair-cd/ ? Maybe it would be a simple way to fix it? Petter -- "I'm ionized" "Are you sure?" "I'm positive."
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