Erased Kernel by Accident (Grub)

**nujinini** · 07-15-2009

Hello Everybody,

I was editing the grub in my dual boot fedora 11/XP laptop earlier by gedit. Since the Fedora already was updated, the grub is showing me TWO choices and since I wanted it to look "cleaner" I tried to edit using gedit. Stupid me erased everything and just just left the "Fedora" word. Now I realize I also removed the kernel.

When I restarted, the grub did not show any Fedora and only Windows XP.

Can somebody PLEASE help me reinstall, or repair this problem of mine?

Thanks in advance!

**devils casper** · 07-15-2009

Its really easy to recreate grub.conf file.

Boot up from LiveCD of any Linux distro. Mount / ( or /boot, if any ) partition and post the name of files available under /boot

Code:

mkdir Linux
mount -t ext3  /dev/<partition> Linux
cd Linux/boot
ls

Post the contents of grub.conf file and output of fdisk -l command too.

Sample :

Code:

default=0
timeout=10

title Windows OS
rootnoverify (hd0,0)
chainload +1

title Fedora
root (hdx,x)
kernel  /vmlinuz-xxxxx  ro root=/dev/xxx
initrd    /initrd-xxxxx

You have to replace x with correct values. Code for Windows OS will work fine without any change.

**nujinini** · 07-15-2009

Originally Posted by devils casper

Its really easy to recreate grub.conf file.

Boot up from LiveCD of any Linux distro. Mount / ( or /boot, if any ) partition and post the name of files available under /boot

Code:

mkdir Linux
mount -t ext3  /dev/<partition> Linux
cd Linux/boot
ls

Post the contents of grub.conf file and output of fdisk -l command too.

Sample :

Code:

default=0
timeout=10

title Windows OS
rootnoverify (hd0,0)
chainload +1

title Fedora
root (hdx,x)
kernel  /vmlinuz-xxxxx  ro root=/dev/xxx
initrd    /initrd-xxxxx

You have to replace x with correct values. Code for Windows OS will work fine without any change.

Hello DC,

Thank you for your quick response and help. I have a PC linux live cd and do your instructions. I will get back soonest.

**nujinini** · 07-15-2009

Originally Posted by nujinini

Hello DC,

Thank you for your quick response and help. I have a PC linux live cd and do your instructions. I will get back soonest.

HTML Code:

[root@localhost Linux]# fdisk -l

Disk /dev/sda: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xc5e3f820

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        1913    15366141    7  HPFS/NTFS
/dev/sda2            1914       30259   227689245    f  W95 Ext'd (LBA)
/dev/sda3           30260       30402     1135800   12  Compaq diagnostics
/dev/sda5            1914       25497   189438448+   7  HPFS/NTFS
/dev/sda6           27411       27435      200781   83  Linux
/dev/sda7           27436       30259    22683748+  8e  Linux LVM
[root@localhost Linux]# mount -t /dev/sda5
[root@localhost Linux]# ls
[root@localhost Linux]#

Can you kindly check if I am doing the right thing please?

**MikeTbob** · 07-15-2009

You want to mount the Linux drive right?
The command would be

Code:

mkdir /linux
mount -t ext /dev/hda6 /linux

Your files will be in /linux directory.

Code:

ls /linux/boot
cat /linux/boot/grub/menu.lst

**devils casper** · 07-15-2009

Execute this

Code:

su -
mkdir /media/Linux
mount -t ext3 /dev/sda6 /media/Linux
cd /media/Linux
ls

Note down filenames of vmlinuz and initrd files and execute this

Code:

nano /media/Linux/grub/grub.conf

Add these contents :

Code:

default=0
timeout=10

title Windows OS
rootnoverify (hd0,0)
chainload +1

title Fedora
root (hd0,5)
kernel  /vmlinuz ro root=/dev/sda7
initrd    /initrd

Replace vmlinuz and initrd with actual filenames.

Press Ctrl+X, Y and hit Enter key to save file.

In case it doesn't work, post the output of ls /media/Linux command.

**nujinini** · 07-15-2009

Originally Posted by MikeTbob

You want to mount the Linux drive right?
The command would be

Code:

mkdir /linux
mount -t ext /dev/hda6 /linux

Your files will be in /linux directory.

Code:

ls /linux/boot
cat /linux/boot/grub/menu.lst

HTML Code:

[root@localhost Linux]# mkdir linux
[root@localhost Linux]# mount -t ext /dev/hda6 /linux
mount: mount point /linux does not exist
[root@localhost Linux]# mount -t ext /dev/hda6 /linux

Hi,

seems to have a problem...

**nujinini** · 07-15-2009

Originally Posted by devils casper

Execute this

Code:

su -
mkdir /media/Linux
mount -t ext3 /dev/sda6 /media/Linux
cd /media/Linux
ls

Note down filenames of vmlinuz and initrd files and execute this

Code:

nano /media/Linux/grub/grub.conf

Add these contents :

Code:

default=0
timeout=10

title Windows OS
rootnoverify (hd0,0)
chainload +1

title Fedora
root (hd0,5)
kernel  /vmlinuz ro root=/dev/sda7
initrd    /initrd

Replace vmlinuz and initrd with actual filenames.

Press Ctrl+X, Y and hit Enter key to save file.

In case it doesn't work, post the output of ls /media/Linux command.

I think I was able to do the first step. Am going to next step

HTML Code:

[root@localhost ~]# mkdir /media/Linux
mkdir: cannot create directory `/media/Linux': File exists
[root@localhost ~]# rmdir Linux
rmdir: Linux: No such file or directory
[root@localhost ~]# rmdir /media/Linux
rmdir: /media/Linux: Device or resource busy
[root@localhost ~]# cd /media/Linux
[root@localhost Linux]# mount -t ext3 /dev/sda6 /media/Linux
mount: /dev/sda6 already mounted or /media/Linux busy
mount: according to mtab, /dev/sda6 is already mounted on /media/Linux
[root@localhost Linux]# cd /media/Linux
[root@localhost Linux]# ls
System.map-2.6.29.4-167.fc11.i586  initrd-2.6.29.4-167.fc11.i586.img
System.map-2.6.29.5-191.fc11.i586  initrd-2.6.29.5-191.fc11.i586.img
config-2.6.29.4-167.fc11.i586      lost+found/
config-2.6.29.5-191.fc11.i586      memtest86+-2.11
efi/                               vmlinuz-2.6.29.4-167.fc11.i586*
elf-memtest86+-2.11                vmlinuz-2.6.29.5-191.fc11.i586*
grub/
[root@localhost Linux]#

**nujinini** · 07-15-2009

Originally Posted by devils casper

Execute this

Code:

su -
mkdir /media/Linux
mount -t ext3 /dev/sda6 /media/Linux
cd /media/Linux
ls

Note down filenames of vmlinuz and initrd files and execute this

Code:

nano /media/Linux/grub/grub.conf

Add these contents :

Code:

default=0
timeout=10

title Windows OS
rootnoverify (hd0,0)
chainload +1

title Fedora
root (hd0,5)
kernel  /vmlinuz ro root=/dev/sda7
initrd    /initrd

Replace vmlinuz and initrd with actual filenames.

Press Ctrl+X, Y and hit Enter key to save file.

In case it doesn't work, post the output of ls /media/Linux command.

Dear Casper,

I was able to put back "Fedora" on the grub. However, when I enter I am getting the following: Error 15: File not found.

I hope it would not be to much to request if you can do the grub config using the info I sent earlier. Maybe I can just copy and paste it to the nano editor? I think I may be putting the wrong things..etc.

Below is what I did for your info please.

HTML Code:

  GNU nano 2.0.7        File: /media/Linux/grub/grub.conf

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,5)
#          kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00
#          initrd /initrd-version.img
#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,5)/grub/splash.xpm.gz
hiddenmenu
title Fedora
        root (hd0,5)
        kernel  /vmlinuz-2.6.29.5-191.fc11.i586 ro root=/dev/sda7
        initrd  /initrd-2.6.29.5-191.fc11.i586.img

                               [ Read 23 lines ]
^G Get Help  ^O WriteOut  ^R Read File ^Y Prev Page ^K Cut Text  ^C Cur Pos
^X Exit      ^J Justify   ^W Where Is  ^V Next Page ^U UnCut Text^T T

**devils casper** · 07-15-2009

Try this

Code:

title Fedora
        root (hd0,5)
        kernel  /boot/vmlinuz-2.6.29.5-191.fc11.i586 ro root=/dev/sda7
        initrd  /boot/initrd-2.6.29.5-191.fc11.i586.img

Or replace /boot with (hd0,5).

Code:

        kernel  (hd0,5)/vmlinuz-2.6.29.5-191.fc11.i586 ro root=/dev/sda7

Thread Tools

Display

Erased Kernel by Accident (Grub)

Posting Permissions