Good Morning Everyone:

I have been studying CompTIA Linux+ Complete Study Guide 2010 Edition online for the last couple of weeks.

So on section 5.2.3 The Boot Process, I was trying to open and see the content of /sbin/init file on my Ubuntu 10.10 notebook edition about an hour ago. I opened it in vi editor. I must have accidentally made a change and then saved it.
(Now I know better, that it is a binary file and can't be read)
Now I can't even boot into ubuntu 10.10. I see the screen stuck in lots of errors.

Does anyone know how to fix it.
I have lots of valuable personal files on it, which I don't want to lose.
By the way, I also tried to boot into recovery mode, but get the same result.



mansour

Hello,

Do you see this screen before, during, or after your boot loader?

Cheers,

Josh

Hello Josh:


After the boot loader.
So I see the boot menu after I turn on my laptop, I choose one line and enter, then I see this screen.


mansour

Just to rule it out, have you tried running a different kernel?

Yes, the same result.

I ran 2.6.35.22 Generic, instead of 2.6.35.28 Generic, but got similar result.
Of course, the error lines are not identical, but they are similar.

This is always the last line on my screen.

with work-notifysig+0x13/0x1b being always the same.


mansour

Ok. You are going to have to run up your live CD, mount your system, and make changes to that file. Do you have it backed up, or do you know what the contents are supposed to be of that file?

No unfortunately I hadn't backed up anything, and don't know what that file looks like. It was binary as I said, so I couldn't read it.

Only if there was a way to download a clean fresh copy of /sbin/init file from The Internet and install it on top of the damaged copy, that should do it.
But how would I achieve this?


I found this tutorial:
http://karuppuswamy.com/wordpress/20...rescue-prompt/

OK, I am able to boot into live CD and On the desktop ==> Places ==> Home Folder ==> I see 7 partitions in the left pane:

127 MB
13 GB
8.0 GB
4.0 GB
4.0 GB
4.0 GB
4.0 GB
5.0 GB


I mounted them all, by right clicking on them and then mount. but how would I know which one is my root partition?

The 127 MB partition includes the grub folder
The 13 GB partition includes the root folder
then there are 5 more partitions.

I can actually see the partition containing sbin folder. That's the one I messed up. /sbin/init file.


mansour

My problem is like this person.

http://karuppuswamy.com/wordpress/20...rescue-prompt/


He had ubuntu 10.04 mine is ubuntu 10.10 notebook edition.
But problem is the same. I messed up the /sbin/init file, and now the machine won't boot into ubuntu.
But how would I export /sbin/init file from the live CD to the machine?
could anyone help me here?



mansour

You could run up the live CD, mount the hard drive, and directly copy the file over.