Hello gurus'

I've deleted /boot/grub/grub.conf file from my RHEL5 system for testing purpose.
I'm unable to do "chroot /mnt/sysimage" so how can I change to /boot directory. I was not able to mount my cdrom.


I have additional queries on this
1. What is exactly happening when this file is deleted??
2. How to recover my system in this scenario??
3. Does 512 bytes of the boot loader gets deleted??
4. Is there any other method to recover my system??

I would be thank full and helpful if anyone can solve this issue.

Thanks and regards
Diwakar

Here this should get you going.

grub.conf is just nothing it is just a file in which entries are made so that next time when you boot your machine you don't have to boot your os manually, instead a file is being read and loadeded in which certain instructions are written that how to pass the control over the kernel and which os should start first.
your mbr is safe till this point,

is it 512 or 446 ?

when you insert your rescue cd just do chroot /mnt/sysimage
then cd /boot
you have to make grub.conf yourself

here is my 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 (hd0,0)
# kernel /vmlinuz-version ro root=/dev/sda2
# initrd /initrd-version.img
#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title Red Hat Enterprise Linux Server (2.6.18-8.el5)
root (hd0,0)
kernel /vmlinuz-2.6.18-8.el5 ro root=LABEL=/ rhgb quiet
initrd /initrd-2.6.18-8.el5.img

I mentioned that I cannot do "chroot /mnt/sysimage".
There is no directory called sysimage in /mnt. I tried doing it.

Nothing. Most of the time grub.conf is just a symlink to menu.lst.
Normaly you get "grub>" prompt.

Reinstalling grub.
Or creating a configfile.

No

See your question 2