To Recover Root Password in Linux

1. Restart the PC while restarting press any key to get Grub Screen
2. Press 'e'
3. Select kernal /vmlinuz-2.6.18.-8.el5 ro root=LABEL=/ rhgb quiet
4. Again Press 'e' to edit
5. Edit kernal /vmlinuz-2.6.18.-8.el5 ro root=/ rhgb quiet line and erase quite and type single
6. Press enter
7. Press b to boot
8. At shell prompt type the commands

sh-3.00# passwd
Changing Password for user root
New UNIX Password:123456
Retype new UNIX Password: 123456
Passwd: all authentication tokens updated Successfully.

Now type the following command to Restart the system to the normal Login

sh-3.00# init 6