Score:1

Server

Urgent help needed with GRUB centos

Jorge O.H.

10/9/22, 9:44 PM

Today I had an email of OVH saying my server was hacked (it was nothing more than a wordpress plugin of a client messing around) but it ended with my server forced to Rescue Mode and I'm not able to boot normally anymore.

My server has 2 disks:

Disk /dev/nvme1n1: 1920.4 GB, 1920383410176 bytes, 3750748848 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: gpt Disk identifier: F41751A6-C420-475C-BB59-E768E17AA2AB

1 2048 1048575 511M EFI System primary

2 1048576 42006527 19.5G Linux RAID primary

3 42006528 3114004479 1.4T Linux RAID primary

4 3114004480 3175442431 29.3G Linux swap primary

Disk /dev/nvme0n1: 1920.4 GB, 1920383410176 bytes, 3750748848 sectors (same as nvme1n1)

Disk /dev/md3: 1572.9 GB, 1572862885888 bytes, 3071997824 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/md2: 21.0 GB, 20970405888 bytes, 40957824 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes

I followed this tutorial (using grub2 commands instead of grub) and it looked promising until the "grub-install /dev/sdx (NOTE that this is the drive and not the partition. try grub-install --recheck /dev/sdxy if it fails)". Tried everything (md2, md3, nvme1n1,...) but all I get is "grub2-install: error: cannot find EFI directory." I already checked if I had the EFI folder and it was there in /boot/efi/EFI/centos. So I have no idea what's wrong. I really need help to solve this and I'm going to pay for the help. Anyone able to help via anydesk or teamviewer? It's really super urgent.

1 + 2

grub2

centos7

ovh

Michael Hampton

10/9/22, 9:57 PM

What is there to fix? Why doesn't your server boot normally? Did you actually try it?

Jorge O.H.

10/9/22, 9:59 PM

It doesn't boot normally, the server get stuck on GRUB when loading from HD.

Score:0

Server

Maxoholic

10/9/22, 11:19 PM

Could be that it's not mounted. You can check it with the mount | grep efi, and if it isn't, you can mount it (mount /dev/[efi device] /mnt/boot/efi).

In any case, you can specify boot/efi directory for grub install, which would look something like this: grub-install --efi-directory=/mnt/boot/efi

0 + 2

Jorge O.H.

10/9/22, 11:31 PM

do I have to mount it in the rescue mode? I'm really blind here, can you help me via remote? I'm facing this issue for several hours, almost 24h awake and I'm starting to be afraid that I cannot solve by myself.

Maxoholic

10/9/22, 11:39 PM

Nah, first just try to specify the `--efi-directory` path when you run grub-install and we'll go from there, if it's still complaining then `grep` it

Score:0

Server

U. Windl

9/1/24, 7:25 AM

Actually the only correct action for a server that was hacked (assuming root access) is to completely re-install, and only restore any files that are definitely not corrupted.

+ 0

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Urgent help needed with GRUB centos

TH: ต้องการความช่วยเหลืออย่างเร่งด่วนกับ GRUB centos

RO: Este nevoie de ajutor urgent cu GRUB centos

RU: Срочно нужна помощь с GRUB centos

VI: Cần trợ giúp khẩn cấp với GRUB centos

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