How To Break Root Password
Case I:--
If Bootloader don't have password or we know bootloader password
Key Points:--
1. Select Redhat linux title and press E to edit
2. Press E to edit kernel line
3. then type 1 after giving single space
4. Below Editing
5. kernel /vmlinuz-2.6.32-71.el6.x86_64 ro ....................crashkernel=auto rhgb quiet
6. After Editing
7. kernel /vmlinuz-2.6.32-71.el6.x86_64 ro......................crashkernel=auto rhgb quiet 1
8. Then Enter and boot by B