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Questions tagged [grub2]

GRUB2 is the second revision of the GRand Unified Bootloader, with versions numbered 1.9x and 2.yz.

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dd copied UUID - How to make GRUB2 find the correct partition?

Using Grub2 on Ubuntu LTS Xenial On sda1, I dd the partition to sdb1(which already has GRUB2 on the MBR) with sudo dd if=/dev/sda1 of=/dev/sdb1 bs=1M. I found that it also copied the UUID. So, both /...
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What is the difference between GRUB variables GRUB_GFXPAYLOAD and GRUB_GFXPAYLOAD_LINUX?

What is the difference between GRUB variables GRUB_GFXPAYLOAD and GRUB_GFXPAYLOAD_LINUX? There is no reference to GRUB_GFXPAYLOAD in GRUB's documentation.
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1answer
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CentOS 7 stuck at grub prompt after upgrading Kernel

I tried to upgrade the Kernel using YUM and when I ran [root@AFIBAMBOO bin]# grub2-mkconfig -o /boot/grub2/grub.cfg No path or device is specified. Usage: grub2-probe [OPTION...] [OPTION]... [PATH|...
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Installed Fedora but missing old Centos7 in Grub menu

I have an existing Centos7 installation installed on a partition. I decided to install Fedora on a separate partition but now the grub menu only shows Fedora. Centos7 is missing from the Grub boot ...
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Mutliboot USB-Stick: Using Grub2 Isoboot

i want to create a bootable USB-Stick with nothing but Grub2 and Iso-Images to select to boot from. I want a default Grub-Menu where i can select which ISO (laying on the USB-Drive) i want to boot ...
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2answers
35 views

Reinstall new linux distro on existing partition without effecting other partitions and GRUB

So, for my studies I got a computer with Windows and Ubuntu. A couple of days ago i tried to change the desktop environment of Ubuntu and kind of broke it hard somehow. Now, I'd like to remove Ubuntu ...
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1answer
83 views

How to recover grub with LUKS encrypted LVM partitions after motherboard replaced?

I had dualboot Windows 10 and Kali Linux x64 (Linux distribution based on Debian 9 x64) on my Lenovo X280 notebook with EFI bios. Windows 10 uses BitLocker with password (not TPM). Linux uses LUKS ...
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1answer
68 views

install Debian to NVMe SSD: unable to install GRUB in dummy [duplicate]

(Dell's) BIOS setting: SATA: AHCI Boot List Option: Legacy (default setting was UEFI) Legacy Option ROMs: Enable Attempt Legacy Boot: Disable installation media: USB drive patition: Guided - use ...
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21 views

boot into FreeNAS using 32bit EFI (not BIOS)

Background: Hardware: MacPro 2006 (has 32bit EFI and can emulate BIOS aka Legacy) 32GB RAM 2 x QuadCore Xeon CPUs (upgraded) 6 x SATA ports 2 x PATA ports Anytime the Mac boots using Legacy, ...
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1answer
41 views

Boot Ubuntu Desktop 18.04 LTS with no boot-loader

I have Ubuntu installed on the hard drive next to Windows. On the end of the installation, I had an error and Grub was skipped. How can I boot this system with no bootloader? Maybe we have some ...
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1answer
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How to replace faulty disk in software raid using lvm

one of the SuSE 12 LinuxServers has reported disk failure. Fortunately the Database Server has Software Raid hence the system is still up and running. But as recommended, we would like to replace the ...
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1answer
56 views

GRUB isn't able to boot from SD card [closed]

I recently installed Windows To Go onto my SD card, which is working fine (when e.g. booting from it using a SD-USB-adapter). Unfortunately my Notebook (Medion Akoya E4253) is not able to boot from it ...
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1answer
54 views

Boot failure with virtualized Windows 7

Ingredients: Running system w/ LinuxMint (main system) and other OS's among which is an old Windows 7 image. System boots via GRUB2 into Ubuntu, Windows with no issues. Here is the system's partion ...
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reboot command in GRUB2 bootloader

I utilized multibootusb to create a bootable USB environment with multiple livecds. GRUB2 (GNU GRUB ver. 2.03) is the bootloader with some "minimal bash-like" shell that does not contain reboot or ...
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1answer
68 views

Failed finding GRUB drives of recently installed distros on another drive, edit device.map?

I am running Linux Mint 19.1 on a Samsung 860 EVO 500 GB (dev/sdb) along with Windows 10 on it and recently added a Crucial MX500 1TB (dev/sda) to try out and use more distros, both of them are ...
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1answer
25 views

Change Linux who owns Grub Boot Loader

I've installed Windows 10, Kde neon and then prime os. When installing primeos, I chosed install grub. Now I don't have an entry for kde neon and the grub resolution is not good at all.
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Windows 10 and linux mint on one ssd disk, how to restore windows partition without losing linux?

I accidentally entered sudo mkfs.ntfs /dev/sda1 in terminal, and now i am unable to boot with Windows. I have Windows and Linux installed on ssd. On startup i have screen where i can select which to ...
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1answer
125 views

Ubuntu 18.04 server installation gets stuck at 66% while running'update-grub'

I am trying to install Ubuntu server but it always gets stuck at the last stage while updating grub.I cancelled the process and rebooted my system, it took me to the grub command prompt grub> . I ...
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1answer
271 views

GRUB Error: grub-install: error: failed to get canonical path of `/cow'

Getting this error while downloading grub. ubuntu@ubuntu:/boot/grub$ sudo grub-install /dev/sda Installing for i386-pc platform. grub-install: error: failed to get canonical path of `/cow'.
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Elementary OS on USB installs GRUB on the laptop instead of the USB

Trying to install Elementary OS to a USB stick , ran into a few problems: I booted from another live usb, formatted a 28GB ext4 for Linux (/dev/sdb1) and a ESP (/dev/sdb5) on the USB, chose to ...
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0answers
101 views

How to dual boot FreeBSD and Linux on the same Hard disk?

I tried installing FreeBSD 12 release version on my system which already had 3 Linux OS installed. It was the minimal install iso image. My internal HDD with GPT partition table. I tried using the ...
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1answer
53 views

grub high resolution wallpaper/background?

I understand that for historic and technical reasons, a standard display resolution of 640×480 was both expected and desirable for high compatibility and minimal resource usage. As we approach a ...
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2answers
93 views

Two grub installations destroying each other

I have linux mint 19 installed on /dev/sda5. Recently I connected an external drive and installed Ubuntu 18.04 LTS on that (/dev/sdb2). After that, I could no longer boot my original Mint installation ...
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How to add same Ubuntu operating system as backup to GRUB?

I have 4 partitions on my hard disk: 15 GB Ubuntu OS (mounted to /) - sda 2 15 GB Backup (not mounted) - sda 3 505 MB Grub (/boot/efi) - sda 1 89 GB GB Data (mount /data) - sda 4 For LTS updates, e....
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184 views

Update-grub detects windows 10 system on NVME drive. Cannot boot generated entry. Not UFI System

I have Ubuntu 18.04.2 LTS and grub 2 installed which boots from a sata SSD drive. This a BIOS system, not UEFI. I have restored Windows 10 to an nvme drive, and fixed its boot structure and drivers ...
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2answers
73 views

Setting Kernel parameters when grub.cfg is on another distro

My setup is: -Windows 10 on a M.2 SSD -Ubuntu 18.04 on a normal ssd (sdb) -Arch Linux on sdb as well but on different partitions I first installed ubuntu with grub and later added arch linux ...
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0answers
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No SVM flag to run virtual machines

I have a machine where i've installed an Ubuntu-studio distro. There i've tried to install the Xen kernel, the XAPI toolstack, and the OpenXenManager; by then i used to have the following results. $ ...
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1answer
156 views

GRUB Boot ISO/disk image from NTFS partition

I'm trying to boot an ISO containing a Linux live system from an existing NTFS partition on a PC. The PC has UEFI, and the hard disk is partitioned with GPT, so GRUB4DOS is not an option. Can this be ...
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1answer
48 views

Can I restore a Grub installation using dd?

I have a dual boot system with this partition layout: # fdisk -l Disk /dev/sda: 596.2 GiB, 640135028736 bytes, 1250263728 sectors Disk model: SAMSUNG HM640JJ Units: sectors of 1 * 512 = 512 bytes ...
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1answer
97 views

GRUB changes are not applied

I am trying to hide the GRUB menu on Linux Mint 19 Cinnamon. I edited the grub file using and entering my admin password twice gedit admin:///etc/default/grub Then I edited my grub file to look ...
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1answer
73 views

Using Label in grub on Debian 9

I installed my server with Debian 9 and Grub with a LABEL. In my /etc/fstab I see My label as followed: LABEL=root / ext4 errors=remount-ro 0 1 /dev/sr0 /media/cdrom0 udf,...
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1answer
25 views

How to put GRUB2 on a CD reading the boot configuration file from harddisk?

After having trouble with Linux (openSUSE Leap 15) and Windows 7 overwriting each other's boot sectors (and me failing to integrate GRUB2 into Windows 7' boot menu), I wanted to put GRUB2 on a ...
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1answer
64 views

Root shell in system filesystem with GRUB

I'm learning about GRUB and, after search for a while, I tried to get a root shell changing the kernel load string: /boot/vmlinuz-4.9.0-8amd64 root=UUID=e8485edc.... ro single to /boot/vmlinuz-4.9....
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1answer
76 views

Ubuntu installation Error 15 file not found

For some reason the existing operating system (Fedora is giving kernel panic error) so I decided to install Ubuntu 16.04.5 LTS desktop version. When I boot from a bootable USB it just shows 2 options (...
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33 views

Dual boot option now showing up with windows and centOS

I know this kind of question is already asked before, but none of those solution worked for me, i am trying to resolve this from last two days but with no success. Problem: - When i start may HP ...
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1answer
73 views

Grub2 install failed with “unable to identify a filesystem in hotdisk… safety check can't be performed”

On a VM-ware insatnce, I am trying to install grub2 bootloader onto a brand new SCSI disk. I want to install it onto the disk's MBR. I run sudo grub-install /dev/sda and got the error "unable to ...
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2answers
72 views

Grub Not Showing All Linux Distros

I installed multiple Linux distros to test them out and learn more about each to see which I like best. I installed two (Ubuntu 18.04 LTS and Mint 19) on a 256 GB SSD (sdc) and four (KDE Neon, Fedora ...
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0answers
47 views

Grub2 Centos 7 installation from ISO on hard-disk drive

I could not get working a grub2 custom item menu for installing Centos 7 on a VM. Actual scenario from lsblk command: 1 disk (sda), with two partitions: sda1 mounted on /BOOT, sda2 mounted on / (dev/...
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73 views

Can't boot Kali with UEFI Stuck at grub-rescue

I had Ubuntu 18.04 on my laptop and just decided to try Kali. I downloaded Kali Linux 64 Bit and installed it using a live USB. Everything looked fine during the installation but I think I messed up ...
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0answers
47 views

Boot a Debian firmware-nonfree netinstall USB device with GRUB2

I have an Apple MacMini Intel running a Debian Stretch (no BIOS-like boot list, just standard GRUB2). I would like to boot on a USB device to set a fresh new installation, with the latest firmware-...
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2answers
167 views

How can I get my drive mounting via fstab again?

I had a nice Ubuntu 18.04 system up and running with many different internal SATA drives and rock solid for several months, and all were happy in the land. Then one day, there was a simple power ...
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0answers
16 views

Check what modules are in a GRUB standalone image without booting?

Is there a reasonably simple way to figure out what modules are inside a GRUB standalone image without booting it?
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1answer
123 views

How to remove a file or folder from within the grub terminal?

I'm encountering problem with my dual-boot installation. I already experienced grub problems in the past, at that time I just deleted a folder (resulting from a faulty distrib install) in my EFI ...
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221 views

Install grub2 on LVM partition

I would like to install grub2 on an LVM partition, i.e., not the MBR. I have a BIOS partition (not GPT) /dev/sda2 which contains an LVM volume group with two logical volumes. One (/dev/vg/boot) is ...
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0answers
26 views

Grub2 disable right arrow booting

Sometimes when I turn on the computer I want to go to a different boot option than usual in grub, so I use the up or down arrow key to get to it. However since they are close to the right-arrow key, I ...
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30 views

What shall I do when meeting GRUB command line interface when reinstalling Lubuntu?

I am trying to solve the question in How shall I split a partition containing `/` and `/home` into two logical volumes? I am not clear what to do. I thought I would just reinstall Lubuntu. Here are ...
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1answer
207 views

What are the differences between the purposes of `core.img` and files in `/boot/grub`?

What are the differences between the purposes of core.img and files in /boot/grub? Thanks. I often heard of two stage bootloading. while here seems to be three stage bootloading in https://en....
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1answer
322 views

grub2 error disk 'hd0,msdos1' not found, ls shows no disk

I have googled a lot for this problem. I found this, but it didn't solve my problem. Other solutions suggest me to reinstall grub (run grub-install), which didn't work either. Here is what I am doing:...
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1answer
47 views

Install from ISO on Boot (CentOS 7)

I have an ISO that lives at /temp/simp.iso and I want to install this software on CentOS 7. Here is my current /etc/grub.d/40_custom file: menuentry "install SIMP" { set isofile="/temp/simp.iso" ...
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1answer
361 views

Recreate bootloader fails with 'cannot find EFI directory'

I setup debian 9 for a friend of mine. Now I got the laptop back and no bootable media is found on start. I booted from the usb drive I installed from using the live mode and followed these steps: ...