How to Restore grub file Redhat Linux 8

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=> Reboot System

=> Insert DVD (in case you have virtual machine)

=> #reboot

=> Select "Troubleshooting"


=> Now choose the "Rescue a Red Hat Enterprise Linux system"


=> After some time you will see the bellow screen :


=> Type "1" for continue and press the enter button


=> Press ENTER Button to get a shell

=> After the enter you will get the bellow mention shell


=> Run Command 

=> sh-4.4#chroot /mnt/sysimage

=> Now Run command for restore grub file:

 => sh-4.4#grub2-mkconfig -o /boot/grub2/grub.cfg

=> Now exit from the cell

=> sh-4.4#exit

=> Now system will restart automatically and grub file restoration done.



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