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Old 03-22-2008, 03:47 AM   #1
dstar101
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I messed up with up Grub....I can not log in Windows or Ubuntu need help badly


I recently installed ubuntu 7.10 on my computer windows with dual boot.Ubuntu was running fine i accidently deleted grub.lst something like that......now when i start my computer i get a promt with "grub>".
So how do i restore my computer..........i having windows on drive C and ubuntu on /dev/sda6


I am writing this from live Cd

Any help greatly appreciated

I backed up a file grub.lst_backup on my c drive it contains following stuff
Quote:
# menu.lst - See: grub(8), info grub, update-grub(8)
# grub-install(8), grub-floppy(8),
# grub-md5-crypt, /usr/share/doc/grub
# and /usr/share/doc/grub-doc/.

## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not use 'savedefault' or your
# array will desync and will not let you boot your system.
default 0

## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout 10

## hiddenmenu
# Hides the menu by default (press ESC to see the menu)
#hiddenmenu

# Pretty colours
#color cyan/blue white/blue

## password ['--md5'] passwd
# If used in the first section of a menu file, disable all interactive editing
# control (menu entry editor and command-line) and entries protected by the
# command 'lock'
# e.g. password topsecret
# password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
# password topsecret

#
# examples
#
# title Windows 95/98/NT/2000
# root (hd0,0)
# makeactive
# chainloader +1
#
# title Linux
# root (hd0,1)
# kernel /vmlinuz root=/dev/hda2 ro
#

#
# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST

### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default options below

## DO NOT UNCOMMENT THEM, Just edit them to your needs

## ## Start Default Options ##
## default kernel options
## default kernel options for automagic boot options
## If you want special options for specific kernels use kopt_x_y_z
## where x.y.z is kernel version. Minor versions can be omitted.
## e.g. kopt=root=/dev/hda1 ro
## kopt_2_6_8=root=/dev/hdc1 ro
## kopt_2_6_8_2_686=root=/dev/hdc2 ro
# kopt=root=UUID=6cf78509-f074-4be3-88bc-bd866bdb145a ro

## Setup crashdump menu entries
## e.g. crashdump=1
# crashdump=0

## default grub root device
## e.g. groot=(hd0,0)
# groot=(hd0,7)

## should update-grub create alternative automagic boot options
## e.g. alternative=true
## alternative=false
# alternative=true

## should update-grub lock alternative automagic boot options
## e.g. lockalternative=true
## lockalternative=false
# lockalternative=false

## additional options to use with the default boot option, but not with the
## alternatives
## e.g. defoptions=vga=791 resume=/dev/hda5
# defoptions=quiet splash

## should update-grub lock old automagic boot options
## e.g. lockold=false
## lockold=true
# lockold=false

## Xen hypervisor options to use with the default Xen boot option
# xenhopt=

## Xen Linux kernel options to use with the default Xen boot option
# xenkopt=console=tty0

## altoption boot targets option
## multiple altoptions lines are allowed
## e.g. altoptions=(extra menu suffix) extra boot options
## altoptions=(recovery) single
# altoptions=(recovery mode) single

## controls how many kernels should be put into the menu.lst
## only counts the first occurence of a kernel, not the
## alternative kernel options
## e.g. howmany=all
## howmany=7
# howmany=all

## should update-grub create memtest86 boot option
## e.g. memtest86=true
## memtest86=false
# memtest86=true

## should update-grub adjust the value of the default booted system
## can be true or false
# updatedefaultentry=false

## should update-grub add savedefault to the default options
## can be true or false
# savedefault=false

## ## End Default Options ##

title Ubuntu 7.10, kernel 2.6.22-14-generic
root (hd0,7)
kernel /boot/vmlinuz-2.6.22-14-generic root=UUID=6cf78509-f074-4be3-88bc-bd866bdb145a ro quiet splash
initrd /boot/initrd.img-2.6.22-14-generic
quiet

title Ubuntu 7.10, kernel 2.6.22-14-generic (recovery mode)
root (hd0,7)
kernel /boot/vmlinuz-2.6.22-14-generic root=UUID=6cf78509-f074-4be3-88bc-bd866bdb145a ro single
initrd /boot/initrd.img-2.6.22-14-generic

title Ubuntu 7.10, memtest86+
root (hd0,7)
kernel /boot/memtest86+.bin
quiet

### END DEBIAN AUTOMAGIC KERNELS LIST

# This is a divider, added to separate the menu items below from the Debian
# ones.
title Other operating systems:
root


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda1
title Microsoft Windows XP Professional
root (hd0,0)
savedefault
makeactive
chainloader +1

Last edited by dstar101; 03-22-2008 at 03:51 AM.
 
Old 03-22-2008, 04:01 AM   #2
kummiliim
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So, you deleted grub's config file, but before that, you backed it up? Well, in that case put the backup in the original's place and you'll be fine. What am I missing?
 
Old 03-22-2008, 04:14 AM   #3
rickh
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Quote:
Well, in that case put the backup in the original's place and you'll be fine. What am I missing?
Well, the "original place" was (presumably) the MBR. I don't have any Windows machines, but as I recall it, that's not a normal place to copy files.

This is not a particularly uncommon newbie experience. You might be able to "reinstall" from your live disk, and skip all the steps except "Install Grub". You may be able to open a terminal from your livecd, and type "install grub". Worst possible scenario, you could use your Windows install disk to rewrite the MBR to the Windows default, then reinstall Ubuntu.

The point here is that I'm not sure what the best procedure is in this case, but someone will be along shortly with a specific solution. Your responsibility, at this point, is not to panic. There are workarounds, and given a little experimentation, you'll be back in service, and will have learned something as well. It's a win-win situation.

Last edited by rickh; 03-22-2008 at 04:15 AM.
 
Old 03-22-2008, 04:53 AM   #4
kummiliim
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Well, he seems to have deleted menu.lst which as far as I know, resides in /boot and not on the MBR (part of stage 2, stage 1 seemed to work for him). I use lilo myself so correct me if I'm wrong.
 
Old 03-22-2008, 05:14 AM   #5
syg00
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I'm not a big fan of Debians grub ad-ons, but "update-grub" looks like it should generate a usable menu.lst. See the manpage - you may have to do some updates and re-run it.
 
Old 03-22-2008, 05:43 AM   #6
enlibertad
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Try this

Hi!

http://odzangba.wordpress.com/2007/0...buntu-live-cd/

http://ubuntuforums.org/showthread.php?t=224351

Have luck!!
 
Old 03-22-2008, 10:45 AM   #7
rickh
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Quote:
Well, he seems to have deleted menu.lst which as far as I know, resides in /boot and not on the MBR
You're right, of course. I was evidently in a state of dementia when I wrote otherwise.
 
Old 03-22-2008, 11:42 AM   #8
tailender
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if u want to logon to any system for now
just enter a windows cd and goto recovery console by pressing R
then logon to the system and
enter command
fixmbr
you can logon to one system atleast.
then try other options.
as mentioned above
 
Old 03-22-2008, 11:59 AM   #9
tailender
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This might help you
 
Old 03-23-2008, 08:09 AM   #10
dstar101
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Location: Quetta, Pakistan,South Asia
Distribution: Moving to Ubuntu very soon
Posts: 47

Original Poster
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Quote:
So, you deleted grub's config file, but before that, you backed it up? Well, in that case put the backup in the original's place and you'll be fine. What am I missing?
I does not allow me to do that

I have booted windows with the help of this link
http://linuxtuts.blogspot.com/2008/0...ub-screen.html

Last edited by dstar101; 03-23-2008 at 08:31 AM.
 
Old 03-23-2008, 08:30 AM   #11
dstar101
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Registered: Oct 2007
Location: Quetta, Pakistan,South Asia
Distribution: Moving to Ubuntu very soon
Posts: 47

Original Poster
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Now i can boot windows but what about linux??
 
Old 03-23-2008, 11:22 AM   #12
Duck2006
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http://users.bigpond.net.au/hermanzo...b_with_Live_CD
 
Old 03-23-2008, 04:52 PM   #13
tailender
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Use the ubuntu live cd
to boot into it

if you know the root partition
mount it as /mnt
sudo mount /dev/root-partition /mnt
then use
sudo grub-install --root-directory=/mnt

& reboot
 
Old 03-24-2008, 08:21 AM   #14
tailender
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Registered: Oct 2006
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hey is the problem resolved
 
Old 03-24-2008, 02:31 PM   #15
dstar101
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Location: Quetta, Pakistan,South Asia
Distribution: Moving to Ubuntu very soon
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Original Poster
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No!!
It was taking long so i logged into windows and back up my data to a usb and with a linux file reader i backed my linux data and installed a fresh copy of windows
 
  


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