How to reset the Root Password

Root password rescue Mode: It is an external Mode of Operation Either by CD or Network

When Grub is not accessible: 
Rescue Mode is virtual Machine

Step 1: 
Star -> Ctrl + B
gPXE > config (Press Enter Button)
DHCP-Server: IP address of the DHCP Server 
192.168.0.1
Ctrl + X to save and Exit
gPXE -> autoboot

Step 2:

Standard Installation Press TAB Button
Type: linux rescue (Press Enter Button)

Step 3: 
Rescue Mode will come

#/mnt/sysimage

Continue
Exam Mode 
Or 
Shell Start
#chroot /mnt/sysimage
#passwd
Provide New Password

Restart the System

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