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
9. then check Selinux
10. if selinux is enforcing then change to permisive by:--
11. #setenfoce 0
12. then change password
Case II:--
If we don't know bootloader password
Key Points:--
1. Boot by Linux DVD
2. Select Rescue Mode
3. #chroot /mnt/sysimage
4. passwd (cmd to change password)
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