cannot change root directory to /mnt/sysimage in Rescue mode

I have forget the redhat6.2 passsword,now i go to rescue mode and type command
chroot /mnt/sysimage but it is showing me error....
cannot change root directory to /mnt/sysimage:No such file or directory
Plz help me to change the root password.

Manish
manishsaxena2007Asked:
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wesly_chenCommented:
Base on Red hat 6.2 manual, there is no /mnt/sysimage in rescue mode.
Please check the following manual:
http://www.redhat.com/docs/manuals/linux/RHL-6.2-Manual/ref-guide/s1-sysadmin-rescue.html

to mount your "/" directory to somewhere like
# mkdir /tmp/root
# mount -t ext2 /dev/hda5 /tmp/root  <=== assume /dev/hda5 is your "/")
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manishsaxena2007Author Commented:
thanks,I have already done that but when i give command to change the password
then it doesnot accept it.even i can not able to open vi editor to change the password
files.Plz tell how to change the password .
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wesly_chenCommented:
> even i can not able to open vi editor to change the password
files.

# mount -t ext2 /dev/hda5 /tmp/root  <=== assume /dev/hda5 is your "/")

After done this, do run "chroot /tmp/root", just edit the /tmp/root/etc/shadow file and delete the second column entry for root account, such as
root::XXX:XXX:XXX:::
      ^
       Delete this entry, which is the encrypted password.
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