Questions tagged [grub]

Console application permitting the user to choose between several installed operating systems.

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29 views

arch linux on zfs root cannot configure grub on bios

as the title suggests I cannot get across the finish line installing arch on zfs. I get to the point where I try and install grub on my /boot after chrooting into my /mnt from the live cd. anyway ...
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1answer
26 views

How do I make grub install on a software-raid disk?

I am running Debian 9 with mdadm RAID 1 on it. Previously both hard-drives could boot into the OS, now only one of them can. I have recently had a faulty disk which needed to be replaced, so replace ...
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1answer
68 views

Auto boot degraded RAID1 on Debian 10 (Buster)

I want my server to boot without manual intervention on degraded RAID1 from second drive on Debian 10 (Buster). It boots when I detach the second hard disk but it doesn't boot when I detach the first ...
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2answers
49 views

CentOS 7: small smiley face on boot?

I've got a problem with a CentOS 7 dedicated server. I've had it for years, and never had any problems with it until now. I did a yum update the other day, and then rebooted the machine, and it ...
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1answer
91 views

GRUB partition accidentially formatted on Ubuntu 18.04

I am facing a case that the the 1MB GRUB partition on an Ubuntu 18.04 server has been accidentially formatted. The server has not been restarted yet. Upon running sudo update-grub the following ...
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2answers
429 views

Ubuntu GRUB installation failed

I am currently in the process of setting up an Ubuntu server but I ran into a few problems... after setting up RAID 0 (two 160GB drives) I tried to install Ubuntu server 18.04.3 LTS but it failed ...
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0answers
68 views

How create RAID 1 on working Slackware 14.2?

I use Slackware 14.2 (with kernel 4.4.14-smp) on sda and I'm trying to create the RAID 1 with additional sdb. I'm using the VM VirtualBox. First, I have cleaned the sdb: dd if=/dev/zero of=/dev/sdb ...
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25 views

GRUB - lvm module parameters

For some reason, grub is not "seeing" a disk that is part of a LVM array because the disk number is superior to eight - or at least, that's what I guess, since if you re-arrange the disks, and set ...
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0answers
505 views

QEMU-KVM: VM will not start with virsh, only with qemu-system-x86_64

I have a vanilla Arch linux VM with disk in qcow2 format. I recently upgraded it and it stopped working. Every time I run $ virsh start Arch I get: Starting version 243.78-2-arch ERROR: device 'UUID=&...
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1answer
105 views

UEFI PXE NFS boot issue with multiple network adapters

I have a working PXE server which detects the client side as either BIOS or UEFI and boots network clients successfully. The purpose of this system is to network boot physical servers in order to ...
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0answers
14 views

FALLBACK logic needed for kernel Upgrade

The Ubuntu Linux system has one hard disk with three disks partition as below fdisk -l Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors Sector size (logical/physical): 512 bytes / ...
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19 views

How can I get kernel / early boot output over my NVIDIA GPU using CentOS 7?

I recently installed CentOS 7.7 with KDE on a machine with both onboard graphics and an NVIDIA GTX 1080 Ti. I got the proprietary NVIDIA drivers installed, but it was quite difficult as I couldn't see ...
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50 views

CentOS 7 and legacy grub?

Having several CentOS 7 based VPS from a provider (VMware virtualization).... I wonder why does the VM boot from /boot/grub/grub.conf and ignores settings in /boot/grub2/grub.cfg whenever I create it ...
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14 views

Downgrade to GRUB 0.97 on external drive

I am a total newb to GRUB so forgive me. I had a VCSA (vcenter appliance) get corrupted during a power outage. I was able to mount the vmdk in another machine, fsck the partition and recover it. GRUB ...
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1answer
155 views

How can I generate/or edit a grub.cfg on each EFI partition that refers to the ubuntu installation on the same physical disk?

I have an install of Ubuntu 16.04 server set up on two disks with software raid across two large partitions. The start of each disk contains an EFI partition. I would like to be able to boot from ...
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1answer
120 views

Are my EFI partitions mutually bootable? How to interpret the output of efibootmgr -v

I have two GPT formatted disks both starting with EFI partitions and followed by a single physical raid partition. I installed ubuntu-server 16.04 with software raid over these two raid partitions and ...
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1answer
77 views

Finding the menu.lst that is being used by grub on a multiboot/multipartition system

How do I find which partition holds the menu.lst being used at boot time? Not looking for multiple locations , as where the file could be, but where it is definitely to be found. (e.t. partition) Is ...
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1answer
144 views

GRUB installing CentOS 7 on CentOS 6 machine with kickstart

I am wondering if someone can provide some help. I am trying to do an automated install (with kickstart file) with CentOS 7 on a CentOS 6 server. However I have failed multiple times so far. I did ...
0
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1answer
190 views

Grub incorrectly escapes $ character in its settings

Not sure where I make mistake but I can't escape $ correctly in /etc/default/grub. I'm on Ubuntu MATE 18.04. This is what I do: In console I edit confid by calling sudo mcedit /etc/default/grub I ...
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2answers
407 views

Can't get grub2 boot menu via COM2 port

I want to connect my "CentOS Linux release 7.6.1810 (Core)" device via COM2 port,then I modify '/etc/default/grub': GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)" ...
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1answer
239 views

Grub stuck at menu until I connect to console using VNC

I installed an Ubuntu 16.04 Server virtual machine on FreeNAS. Everything works as expected, except GRUB. When I reboot the machine with sudo reboot, it does not boot automatically. Every time I have ...
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0answers
63 views

Editing /boot/grub/grub.conf not recommended - yet how do you then change entries?

For example, our /boot/grub/grub.conf looks like this: ## ## End Default Options ## title Debian GNU/Linux, kernel 3.2.0-4-amd64 root (hd0,0) kernel /boot/vmlinuz-3.2.0-...
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1answer
21 views

grub2 starts after grub rescue while trying to save my debian server

After screwing up in Debian Jessie (accidentally run rm -R /) my server stopped responding and I decided to reboot. After rebooting grub rescue started and tried to fix it by running the following ...
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95 views

How to setup bootable RAID 0 on remote server

I have a remote server with 2 identical 500Gb SSD, sda and sdb. A rescue mode is also available from the cloud provider's interface. How to get Debian installed on a bootable RAID 0? I understand I ...
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2answers
2k views

grub-pc which “install device” should I chose?

I have been running ubuntu 18 on linode for about 6 months and just did "apt update" followed by "apt upgrade". It asked me which grub file to use, for which I selected "keep current file" as this is ...
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1answer
3k views

mount: mounting /dev on /root/dev failed: No such file or directory after converting lxc to virtual machine

I've been trying to convert an lxc container to a virtual machine, but I've encountered a problem when trying to boot. I end up with the (initramfs) command line and I've got the following errors: ...
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2answers
330 views

install grub 0.97 to new 4TB disk

Stooped question but I cant understand why it not work. I have rhel 5.5 kernel 2.18. I clone OS from 750 gb disk to another 4 TB disk. I parted disk to 2 partition. 10gb sda1 40 gb sda2 I clone ...
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1answer
359 views

Grub2 fails to detect partitions if it was installed into file

I'm trying to prepare an image that I can dd into disk or boot using PXE. Some context: I create an image, partition it using sfdisk (MBR), create loop devices for the whole disk and main partition, ...
0
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1answer
315 views

ext4 corruption leading to unbootable disk. Partition is mountable, but grub detects unknown filesystem

I'm trying to recover from a system disk corruption issue without having to reinstall the OS, which would be super-painful currently. I'm using Ubuntu 18.04, the affected partition is ext4 and on a ...
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1answer
448 views

Can't boot into ubuntu server 16.04 after successful installation

I've installed 16.04 on Dell R710 server on RAID6. Boot mode is set to UEFI in BIOS. After successful installation it stays in grub> console. Output to ls command is (hd0) (hd1) (hd1,apple2) (...
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0answers
57 views

Not booting from hard disk after Installation from USB?

I downloaded kali 32bit images from Official Kali website, then installed on my existing windows 7 machine erasing and creating a single partition. Now, after rebooting error: no such device: ...
5
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1answer
11k views

KVM gets stuck at “Booting from hard disk”

I am trying to run Ubuntu-server-16.04 virtual machine on a KVM converted from .vhdx (Hyper-V) to .qcow2 (KVM). When I import my virtual disk image and start virtual machine, the KVM hangs on "...
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0answers
206 views

Customized Red-Hat 6.7 to 7.4 upgrade

I have a customized RHEL6.7 server, it has several LVM2 partitions, the root volume is LVM2 based and is located on: stats/rootvol im editing the current GRUB (0.97 which part of RHEL67) to look like ...
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0answers
414 views

grub2 RAID1 disk failure - unable to boot

Background I am setting up a server with software RAID1. This includes the /boot partition being mirrored (mapped to md0). My aim is that if one of the two hard drives containing the OS (sdc and sdd) ...
2
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1answer
3k views

editing the value of GRUB_CMDLINE_LINUX_DEFAULT thru bash script

I want to append fastboot to the end of the existing value of the GRUB_CMDLINE_LINUX_DEFAULT variable in /etc/default/grub not manually, but by using bash script and echo command. The problem is that ...
0
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1answer
636 views

Automated install using preesed - grub confirmation message issue

I am performing an automated install of a custom ubuntu 14.04 server using a combination of preseed and kickstart methods. Everything is fine except the annoying grub confirmation message as shown ...
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0answers
157 views

How can I get a Linux *partition* image to boot in a XenServer virtual machine?

I am trying to migrate a Linux PC to a virtual machine running in XenServer. Normally I would just create an image of the boot disk (/dev/sda) with dd and use that to overwrite an empty virtual disk ...
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0answers
501 views

Fedora 26 UEFI/EFI Rescue Boot

I need to rescue an unbootable UEFI Fedora 26 system. I have booted from the DVD, and used the rescue choot environment. I have a GPT disk with a small FAT32 ESP partition of type EF00. I've run: ...
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2answers
597 views

How-To Chain Boot/Trampoline Boot into Ubuntu 17 on PCIe SSD without BIOS support

I have a server-grade SSD (Intel DC P3520) that will eventually end up in a server. Until the server is deployed in the data center I want to conduct some tests in a desktop machine. I have an older ...
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2answers
1k views

install grub in a usb and boot proxmox from another drive

Good morning my friends! I'm tryng a solution before buy some new hardware. So this is my situation: I have some beautifull hp dl360p gen8 that comes with an p420i hardware raid controller. What ...
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3answers
1k views

GRUB hangs before menu, after a HDD upgrade. How to debug?

I have a problem on a server with 4 x 1 TB drives running Debian wheezy and GRUB 1.99-27+deb7u3. sda and sdb have partitions mirrored using (Linux software) RAID1, including /boot. sdc and sdd have ...
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1answer
2k views

dracut: Switching root

After my hosting company did some changes (no technical description for them) I got the following boot error for my CentOS: What I must do to get my servers up! I tried to ask for support at the ...
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2answers
2k views

What is Grub-install actually doing?

I have a client who accidentally converted the partition table of one of their Linux system from DOS to GPT. Unfortunately, the GRUB version is 2, and the system didn't have a BIOS boot partition for ...
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1answer
94 views

How to handle grub when adding new system and removing old one?

I want to upgrade my Proxmox cluster from 2.2 to 4. I think I have this well thought, but there's one thing I am not sure of. Currently, my installation runs on LVM A. I have added few new disks and ...
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1answer
1k views

'Could not find filesystem /dev/root' after Clonezilla clone of redhat install to newer hardware'

I am cloning what appears to be a redhat 4 (possibly 5?)server to fairly newer hardware, as the original has a failing board. DBA would rather not reconfigure a new installation so they want me to ...
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0answers
202 views

How to diagnose why Grub won't boot a Windows partition?

I just imaged a Windows partition onto a new drive with dd. Then I changed the NTFS UUID to a new one. Then I ran update-grub (using grub2) and restarted. Now there is a new menu entry in the Grub ...
1
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1answer
262 views

Error message encountered when booting a debian VM

When booting a Virtual Machine powered by a Debian 8 "Jessie" distribution, this error message appears : Error 24: Attempt to access block outside partition 1 I'm quite sure that it's a GRUB problem ...
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2answers
520 views

Ubuntu: updated mainline kernel, now drops to initramfs

I attempted to upgrade our system's mainline kernel and am now dropping into initramfs. < update>: The commands I used were: apt-get update apt-get upgrade apt-cache search linux-image //grabbed ...
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0answers
139 views

GRUB “USB lock” for Linux Full Disk Encryption

Hy everyone. I'm investigating the possibility of using something like USB hardware locking dongles (like these ones used for software locking and licensing) to provide the key that Grub asks for ...
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1answer
72 views

Centos 5.4 wont boot

I have three disks in a centos server but it won boot,I have no grub at all.I tried to install grub with super grub and fix the system with rescatux but in vain.Is there a way to boot into centos?Here ...

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