Ubuntu 11.04 power failure during install get grub but no disk?

Please boot from Ubuntu 10.10 live install cd and perform a partition check for errors...

To see partitions type:

sudo fdisk -l

Then using terminal type:

sudo fsck /dev/...

Currently cutting Ubuntu 10.10 disk with iso image as the failed PC was running 10.10 and I only have CD with 10.04 image. This is AMD64 image BTW.
Would rather boot CD to same OS ver as was running before.

I see a "fsck" check and repair LInux file system might well work, will keep you informed.
Thanks

Hmmm?

Booted to CD and ran the commands you suggested.

sudo fsck /dev/sd1

disk shows all OK but then restarted system and still get the same message after the GNU GRUB interface?

Any further suggestions?

If I boot up and then get the GNU GRUB interface with the choices I mentioned earlier and select recovery mode I get the same errors with choices of S to skip mounting or M for manual recovery.

Choosing M I get a prompt
root@FamilyPC:~#

but this is without connectivity, therefore no connection to run the commands you suggested.

Do you perhaps mean boot form the 10.10 CD again and run these commands, which I think you may do?

Fixed and all appears to be working now.

I booted to CD with Ubuntu-10.10-alternate-amd64 image. This gave me the option to repair the system and get a prompt with the main bootable HD (/dev/sda1) and network connection. As mentioned the GNU GRUB (recovery mode) option did not get me to a system prompt with network.

Then I ran the commands you listed from the prompt. Had to reboot manually as sudo reboot did not work, probably due to access using CD?
The first command "sudo dpkg --configure -a" appeared to do the most work and when asked to use maintainer config or existing I chose Y for maintainer, was a risk for me as not sure how it would change my settings but as mentioned all appears to be working fine with 11.04 'natty', which I quite like!

This OS needs a confident user but gee it's really good.
Thanks so much for your instant response and input.
Chris

Thanks marcobra (Marco Braida), that solved my question.

Hi Marco

I have the same problem, unfortunately, I do not have access to Ethernet Internet access.

I am at this stage presently

"sudo fsck /dev/sd1

disk shows all OK but then restarted system and still get the same message after the GNU GRUB interface?

Any further suggestions?"

It may be possible for you to use an Ubuntu CD as source to rebuild even if it is an earlier version?
You would have to boot off the CD and mount your /dev/sda1 HD then point to the CD as source of the files?

Perhaps Marco could confirm this?

@Christopher Brown, when you booted the alternate image, what did you do to get the repair option? When I booted my Xubuntu 10 disc there was no repair option in the list. Just the test, install, memcheck and boot to hdd

Booting to the alternate image provided a number of choices of which I cannot remember them all and I am away from my home Linux machine at present. One of the options was definately to a repair option, it was the last in the list.
Here is a link to some info. about the Alternate Install CD:
http://releases.ubuntu.com/10.10/ (page down to 3rd heading on page).

This is the image I used and it provided me with a prompt and network access. I could then see my HD with bootable Linus partition (/dev/sda1) and run the commands Marco kindly provided.

I booted to ubuntu-10.10-alternate-amd64.iso following Christopher's link. What is the repair option that you did? The last one is called 'expert' and it goes to ubuntu installation.

Are you sure is the last one? I didn't see any prompr.

Thanks

Again, away from Linux machine at present but will post a list of the options I got after booting to the alternate image when I get back home this evening.
The prompt I got BTW was # at the bottom of the monitor screen, with full access to network, which is ethernet hard wire connetion to router.

here is how i solved my probleme.

Run a 10.10 livecd session.
Open a terminal and enter the following commands.

sudo mkdir /media/system
sudo mount </dev/partition> /media/system # main is /dev/sda5 you can get yours from gparted
sudo mount --bind /dev /media/system/dev
sudo mount -t proc /proc /media/system/proc
sudo mount -t sysfs /sys /media/system/sys
sudo chroot /media/system
sudo dpkg --configure -a

Restart your computer and enjoy your new fully working system.

Thanks yassinevic, I had the same problem and your solution works

In my case, the problem was caused in the first place by an error in /var/lib/dpkg/status: dpkg's parser seems to have become overly strict since the last release.