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Questions tagged [grub2]

GRUB (GRand Unified Bootloader) is a bootloader package to load operating systems. GRUB2 is a rewrite, and the dominant version since 2009.

Grub (GRand Unified Bootloader) is a bootloader package.

Briefly, a boot loader is the first software program that runs when a computer starts. It is responsible for loading and transferring control to the operating system kernel software (such as the Hurd or Linux). The kernel, in turn, initializes the rest of the operating system (e.g. GNU).

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grub rescue on Ubuntu 18.04 with btrfs partition

I have a small server (HP ProLiant MicroServer Gen8) running Ubuntu 18.04 64 bit with the latest HWE generic kernel (5.4.0.74.83~18.04.67); it has two SATA drives, GPT partitioned but booting in legacy BIOS mode. Both drives are partitioned as…
Matteo Italia
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Reshape root disk from raid1 to raid5 on live system

I have server with CentOS 7 and grub2. It is in hosting company so I can not reinstall it. Server root / is installed on (mdadm) RAID1. Size is 4 TB, but is made somehow without EFI. These is small /boot, also (mdadm) RAID1. I can convert / to…
Nick
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Virtualbox not recognizing GRUB

I ripped a Linux Mint partition into a file using the dd command: sudo dd if=PART_PATH of=OUTPUT_PATH/ubuntu.bin Then I converted it into a *.vdi VBoxManage convertdd PATH_TO_ubuntu.bin ubuntu.vdi --format VDI But when I try to boot into the vdi…
Destiny Fan
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How to move /boot and / to different disk

I have Debian server with multiple HDDs. /, /home/, swap and others are LVM Logical Volumes. /boot is on a small partition at the beginning of one of the physical HDDs. fstab uses UUID for /boot and /dev/mapper/ for the rest. I want to move the root…
badluck
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GRUB2 theme looks broken after update (2.02->2.04)

Coming from Grub 2.02, and upgrading to 2.04, adding it to our TFTP server for PXE booting; I built the new grub2 image as in: /tmp/rebuild_grub/bin/grub2-mkimage -c ./grub-embedded.cfg -p '(tftp)/blah' -o grubx64-with-embed.efi -O x86_64-efi…
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Detect different keys on GRUB2 menu

I have a GRUB configuration that looks like the following, where I would like to detect different key inputs so I can act accordingly, but this does not work by default: echo "" echo -n "server: " echo -n $net_default_server echo -n " client:…
djuarezg
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Wrong grub2 prefix when booting over network

I have dnsmasq in proxy mode, serving pxe service and tftp server using this config: port=0 log-dhcp log-queries log-facility=/var/log/dnsmasq.log dhcp-range=192.168.0.0,proxy enable-tftp tftp-root=/tftp pxe-service=x86-64_EFI,boot,…
František Jeřábek
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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 never came back up. I'm using an IPMI session now…
Codemonkey
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How to get rid of GRUB2 error "failure reading sector 0xb30 from `fd0'" on HP server

When I boot into my HP ProLiant DL120 G7 server's GRUB2 rescue shell, I get the following output: error: failure reading sector 0xb30 from `fd0'. error: failure reading sector 0x0 from `fd0'. error: failure reading sector 0xb30 from `fd1'. error:…
nh2
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unattended memtest: is it practical?

I will be building a medium scale cluster (20 nodes, expanding later) and for various reasons, using commodity hardware should give me a significant cost saving (even allowing for shorter operational cycles / failures). My worry is about persistent…
symcbean
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No boot in Devuan after installation - EFI Shell

I installed Devuan ASCII on a virtual machine on VirtualBox. Installation went smooth, but after installation I get the following EFI shell See the image But any attempt to enter a BLK* device ended with the current directory not specified message…
JaKaiser
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SUSE 13.2 GRUB Configuration FIle

I just installed OpenSuse to learn it. I'd like to open the system in runtime 3 mode. According to the documentation I have to edit /boot/grub/menu.lst file. Unfortunately this file does not exist on my system. Does anybody know why please? I need…
Adam
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Text Mode Installation Of Ubuntu Server 13.10 With No Graphical Screens At the Installation Time

I am doing Ubuntu Server Installation, At this time when i just start installation of Ubuntu Server 13.10, I see Graphics, Is this possible to remove graphics and and only command line installations? My Syslinux.cfg looks like this: timeout…
Pradeep Gupta
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How do I log in to the ubuntu 10.04 server using grub2 from a remote computer/terminal with GUI running

I upgraded my server from ubuntu 8.04 to 10.04. It now uses the grub2 bootloader. In 8.04 from the grub log-in page I could select the option log in to server and thereby connect through SSH directly to my server and have the GUI running. I can…
Steve Cornall
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How big is grub2?

Due to "Meltdown" I am in the progress of moving our CentOS7-XEN-PV-DomUs to HVM mode. See here on why I need to migrate to HVM This involves installing a bootloader - unnessesary on PV-DomUs, since they use pygrub to emulate the grub/grub2 boot…
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