Comments on: How to Recover or Rescue Corrupted Grub Boot Loader in CentOS 7

By: Raj

Raj — Mon, 10 Feb 2020 11:27:11 +0000

Hi all, When I'm updating my centos 7 server. one package "Libmnl" I installed and updated the server. after rebooting the server is completely down. if I am trying to troubleshoot the server after GRUB boot it is showing blank console. it is not coming to single-user mode also. This is a staging server Can anyone help me, how to fix this issue?

By: Greg

Greg — Sun, 08 Dec 2019 20:17:26 +0000

In reply to Partha. If anyone else ends up here with this issue. I ran these steps successfully but it still went to the "gurb>" menu (even after attempting to recreate the /boot/grub2/grub.cfg file). There was no error but it dd not replace the grub.cfg file. I manually moved it to grub.cfg.bak and copied a rpmsave version of the grub.cfg file to grub.cfg. I also did a restorecon -rv /boot/grub2/ (although I don't know if this had any impact). Now it boots properly.

By: Ravi Saive

Ravi Saive — Fri, 05 Jul 2019 05:21:45 +0000

In reply to Omar.

@Omar,

I think its filesystem problem try to fix it by running fsck.

By: Omar

Omar — Thu, 04 Jul 2019 16:01:27 +0000

I keep getting the error 'Welcome to emergency mode!' whenever I start my centos7 on my virtual box. I welcome your assistance.

By: Gary

Gary — Fri, 11 Jan 2019 14:29:23 +0000

I completed the steps listed here successfully. The only addition was that I had to manually mount /boot and /boot/efi. I ran grub2-install /dev/sda and grub2-install /dev/sdb (I have RAID1 for /boot and manually cloned /boot/efi). I got no errors, but when I try to reboot it just returns to the grub> prompt