Can't access since last updates ver 10.04

David, in your update, you have not done completely the conversion from grub-legacy to grub2, but try out the following steps when you reached the "sh:grub>" prompt.
sh:grub>search -f /vmlinuz
This will give you an output in hd0,x and lets say, as an example, hd0,5.
then type the following
sh:grub>linux (hd0,5)/vmlinuz root=/dev/sda5 ro
sh:grub>initrd (hd0,5)/initrd.img
sh:grub>boot

note: sda5 is in example above, please modify to whatever your hd0,x is in output
When booted up, at terminal, install grub2 completely by
sudo install grub-pc

follow further instructions completely and carefully including installing to 'sda'

Boot to liveCD and reinstall grub

That can also work but will be much tougher and he needs to chroot and that is dangerous for a new user. But perhaps you could show him step by step how to do that instead of just referencing the web page or just telling him to "Boot to liveCD and reinstall grub"?

Reinstalling GRUB 2
There may be times when a user needs to either move or reinstall a GRUB 2 installation. GRUB 2 needs to be reinstalled when a user is presented with a blank screen with only the word "GRUB", no prompt, and no ability to enter commands. This often happens when the MBR of the booting device is altered and GRUB 2 is removed, such as when Windows is installed after Ubuntu. Additionally, if a user cannot boot into an operating system at all, even using the rescue mode mode, a complete reinstallation of GRUB 2 may be necessary.

Reinstalling from LiveCD
If you cannot boot from GRUB 2 review the section Boot Problems and Rescue Mode. If a reinstall becomes necessary follow these instructions. Two methods are presented; both require booting from a LiveCD (Ubuntu 9.10, Karmic Koala or later version). If the first method does not work, follow the second method, which is more complex and contains more options and instructions.

SIMPLEST - Copy GRUB 2 Files from the LiveCD
This is a quick and simple method of restoring a broken system's GRUB 2 files. The terminal is used for entering commands and the user must know the device name/partition of the installed system (sda1, sdb5, etc). The problem partition is located and mounted from the LiveCD. The files are then copied from the LiveCD libraries to the proper locations and MBR. It requires the least steps and fewer command line entries than the following methods.

Boot to the LiveCD Desktop (Ubuntu 9.10 or later).
Open a terminal by selecting Applications, Accessories, Terminal from the menu bar.
Determine the partition with the Ubuntu installation. The fdisk option "-l" is a lowercase "L".
sudo fdisk -l
If the user isn't sure of the partition, look for one of the appropriate size or formatting.
Running sudo blkid may provide more information to help locate the proper partition, especially if the partitions are labeled. The device/drive is designated by sdX, with X being the device designation. sda is the first device, sdb is the second, etc. For most users the MBR will be installed to sda, the first drive on their system. The partition is designated by the Y. The first partition is 1, the second is 2. Note the devices and partitions are counted differently.
Mount the partition containing the Ubuntu installation.
sudo mount /dev/sdXY /mnt
Example: sudo mount /dev/sda1 Note: If the user has a separate /boot partition, this must be mounted to /mnt/boot
Run the grub-install command as described below. This will reinstall the GRUB 2 files on the mounted partition to the proper location and to the MBR of the designated device.
sudo grub-install --root-directory=/mnt/ /dev/sdX
Example: sudo grub-install --root-directory=/mnt/ /dev/sda
Reboot
Refresh the GRUB 2 menu with sudo update-grub
If the user wishes to explore why the system failed, refer to Post-Restoration Commands section below.

Good one, parsnip; glad to see your message. But of course, I am biased towards my way. Many ways to skin a cat, as they say. Take care.

To David, after all he's the one who needs help, please follow what you deem comfortable, you won't offend any of us, I think.... but if you need further help, just yell.

Good one, parsnip; glad to see your message. But of course, I am biased towards my way. Many ways to skin a cat, as they say. Take care.

To David, after all he's the one who needs help, please follow what you deem comfortable, you won't offend any of us, I think.... but if you need further help, just yell.

OK, followed your advice and don't know that I got the response I needed.
On the "search -f /vmlinuz" the response was "loop 0". Is this the number I install in the "hd0.x" for x?
I tried that and got "error:unknown filesystem.

I really appreciate your help.

Dave Mitchell

Your question #116576 on Ubuntu changed:
https://answers.launchpad.net/ubuntu/+question/116576

    Status: Open => Answered

Goh Lip proposed the following answer:
David, in your update, you have not done completely the conversion from grub-legacy to
grub2, but try out the following steps when you reached the "sh:grub>"
prompt.
sh:grub>search -f /vmlinuz
This will give you an output in hd0,x and lets say, as an example, hd0,5.
then type the following
sh:grub>linux (hd0,5)/vmlinuz root=/dev/sda5 ro
sh:grub>initrd (hd0,5)/initrd.img
sh:grub>boot

note: sda5 is in example above, please modify to whatever your hd0,x is in output
When booted up, at terminal, install grub2 completely by
sudo install grub-pc

follow further instructions completely and carefully including
installing to 'sda'

--
If this answers your question, please go to the following page to let us
know that it is solved:
https://answers.launchpad.net/ubuntu/+question/116576/+confirm?answer_id=0

If you still need help, you can reply to this email or go to the
following page to enter your feedback:
https://answers.launchpad.net/ubuntu/+question/116576

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subscriber of the question.
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Ok, the previous question which you did not answer was:
On the "search -f /vmlinuz" the response was "loop 0". Is this the
number I install in the "hd0.x" for x?

What I need to know is how do I get the .x portion for hd0?

Either I'm missing something, or you need to remember that I'm newbie in Linux.
command line entries are no problem but please do not leave any holes.

Thanks,
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Yeah, I kind of figured that out. Oh well, I still like Ubuntu better than Blinders, er, I mean winders.

Thanks for your help.