Grub (GRand Unified Bootloader) is a bootloader package.

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Virtualbox: booting OS X guest on Ubuntu host on a Macbook Pro [closed]

I like Linux as my primary OS, but sometimes one needs to run proprietary software. Historically I've used Virtualbox' raw disk feature to load a native partition as a VM, and on PC hardware this ...
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2answers
60 views

Centos grub bootloader missing after installing windows 10

I first installed CentOS 7 on my laptop, 2nd I installed Windows 10 in same hard disk with different partition, but I couldn't get my Centos 7 info in windows boot loader. I tried easyBCD tool to get ...
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17 views

Recovering grub2 after raid1 disk change: stage1 not read correctly

After recovering from a raid1 disk change I cannot install grub2 any more. I think that I recovered from the disk change correctly (the raid array assembles, I can mount and access the data, etc.) but ...
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0answers
23 views

Bios boot devices are messed up [closed]

I hope I'm on the right StackExchange here.. bare with me. I have installed and removed a few linux and windows distributions. Now all of them are displayed as boot device in my mainboard. I only ...
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0answers
15 views

How to validate grub boot environment parameters with grubby

I am updating grub parameters in RHEL 7.0 with grubby command using /usr/sbin/grubby --update-kernel=ALL --args='isolcpus=14-24' followed by /usr/sbin/grub2-install /dev/sda and reboot I very well ...
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41 views

Must boot manually after a manual installation of Debian on ZFS root file system

I've installed Debian manually with debootstrap on my NAS, with a ZFS root file system (/ on a pool named rpool) At each boot, the system goes after the bootloader screen on a busybox console where I ...
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0answers
51 views

Bootloader password - existing content found in /etc/grub.d/01_users

I need to set a bootloader password and am apprehensive about changing the existing config (per warning about potentially making a system unbootable). RH documentation says to add the following ...
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1answer
233 views

How to remotely initiate netinstall of CentOS 7?

I've got 50+ machines running either CentOS 6.4 or 6.8. I wish to re-install these machines with CentOS 7 using a configuration script (for example using the "basic server" template and setting ...
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0answers
83 views

Problems installing software on AWS EC2 instance (Debian 7.8 'hvm')

After some issues due to the lack of support in required kernel for the network card in my machine (though I'm aware of how to compile the driver for my card, I don't want to do that, based on some ...
2
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0answers
38 views

Setting bootloader password in EL7

Using this guide I am attempting to add a bootloader password to a CentOS7 install. When prompted, enter the password that was selected and insert the returned password hash into the ...
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1answer
34 views

OpenSUSE Xen installlation is not in Grub 2

I'm sorry if this is a duplicate but somehow serverfault search action didn't work with my browser. I have a functional recent OpenSUSE Tumbleweed installation and I want to turn it into a ...
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1answer
225 views

WDS&PXE booting using Grub2 - choosing menuentry

I have problem with booting to WDS using PXE with Grub2. Actually we are using WDS with DHCP (Windows) - on DHCP I have WDS IP and 'grldr' file as bootfile name (grub loader) with menu.lst file (on ...
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2answers
98 views

Hide kernel messages in plymouth

I am running Ubuntu 14.04 server for Kiosk application. The problem is when kiosk is starting , kernel shows some debug messages about stuff like USB port error and such things, and those ugly ...
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0answers
92 views

Why is grub not booting from 2nd drive? - boot info says “no valid partition table found”

My volumes look like this /dev/xvda1: LABEL="cloudimg-rootfs" UUID="d4f2aafc-946a-4514-930d-4c45e676f198" TYPE="ext4" /dev/xvdf1: LABEL="permaroot" UUID="afb7e502-ad08-4d6a-8701-2c05863f958e" ...
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1answer
164 views

Can't get rid of mystery kernel

Just noticed that despite having the kernel updated regularly, the version in use is quite outdated: $ uname -a Linux test 2.6.31-302-rs #7 SMP Thu Oct 29 22:57:03 UTC 2009 x86_64 x86_64 x86_64 ...
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0answers
515 views

Ubuntu RAID1: How to boot after (physically) removing /dev/sda? (mdadm, Grub2)

Several months ago I installed Ubuntu 14.04.2 Server (x64) with RAID 1 using the following instructions: https://help.ubuntu.com/lts/serverguide/advanced-installation.html I followed the ...
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0answers
131 views

Cobbler with openSUSE

I am using Cobbler to run SuSE Linux Enterprise (SLES) and it has been running fine. Currently I am using the same setup for openSUSE and I am having some problem in getting the autoyast to work. ...
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1answer
94 views

XEN - Does pygrub alter grub on dom0

I apologize for question but I did not really understand the idea behind pygrub. I've downloaded VM from stacklet.com. The image is shipped as a ext4 file and pygrub config. My question is if I can ...
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0answers
963 views

CentOS 7: GPT and software RAID 1 without 'biosboot' partition

I have a CentOS 6 server with software RAID1 (2x3TB): - sda # parted /dev/sda unit s print Model: ATA TOSHIBA DT01ACA3 (scsi) Disk /dev/sda: 5860533168s Sector size (logical/physical): 512B/4096B ...
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2answers
1k views

XenServer 6.2 VM 100% CPU and 100% memory usage and won't boot

I had this problem today after a power failure. I had 2 vms and one of them won't boot and was using 100% of CPU and 100% of memory. Since it was very dificult to solve (at least for me) I want to ...
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0answers
104 views

grub2 password protection does not work with plain text

I am using centos 7 and I am trying to configure grub password protection, when using pbkdf2 encryption everything is ok but using plain text password it does not work. I have taken care of syntax ...
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2answers
556 views

how to disable serial console after successful boot (systemd/grub2)

I enable the serial console during the boot process on centos7 which uses grub2 and systemd (instead of inittab) I would like to undo that serial input/output at the very end of the boot, after a ...
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1answer
1k views

SUSE 13.2 GRUB Configuration FIle [closed]

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 ...
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1answer
605 views

How to add systemd.setenv in GRUB2

I would like to add systemd.setenv=NSS_HASH_ALG_SUPPORT=+MD5 parameter in grub2 for centos7? I don't know which files I've to modify, and which lines I've to insert this parameter. Thaks for your ...
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2answers
7k views

Grub rescue, will not boot from mdadm RAID, no such disk or device — mduuid wrong?

I am running a 14 disk RAID 6 on mdadm behind 2 LSI SAS2008's in JBOD mode (no HW raid) on Debian 7 in BIOS legacy mode. Grub2 is dropping to a rescue shell complaining that "no such device" exists ...
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0answers
282 views

EC2 AMI instance store backup grub utility required

Working on backup of whole ec2 volume and image to upload to s3. Using RHEL7 and it internally uses Grub2 as bootloader. EC2 AMI tools requires grub legacy loader and I'm struck up in this loader. ...
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1answer
590 views

OpenSuse 13.1 GRUB2 downgrade GRUB stuck on menu

I was trying to virtualize a opensuse server and discovered that GRUB2 is not supported by VMWare, at least without some fiddling. I went into Yast and changed the bootloader from GRUB to GRUB2, and ...
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4answers
7k views

GRUB “Some modules may be missing from core image” Error

one HDD crashed from my RAID and I added a new HDD. Now I wanted to install GRUB to the new HDD: with grub-install /dev/sdb. I get these errors: Installing for i386-pc platform. grub-install: ...
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1answer
401 views

grub2/initramfs disaster recovery

One of my ubuntu 12.04 is a vm on vmware ESXi host. It has separate boot and root partition. One developer did fsck on the live root partition by mistake and this vm can only boot to initramfs mode ...
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1answer
357 views

Ubuntu/Grub2: Crypted grub password doesn't work, what could be the reason?

I've used the command grub-mkpasswd-pbkdf2 in order to encrypt my password, then I took the hashed password and placed it in my Ubuntu 14.04 /etc/grub.d/00_header: cat << EOF set ...
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146 views

In Ubuntu, how to enter grub rescue mode when gettint error 17

I'm booting up a machine and I'm getting error 17 from Grub. Is there any way to enter grub rescue mode without a live cd? (this is a remote server that I have no access)
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3answers
2k views

Ubuntu Grub fails with: unknown command recordfail

I installed some patches on a Ubuntu 10.04 Server (LTS) system today. After rebooting the newly patched server the boot process is now hosed with an unknown command 'recordfail' message. If I hit a ...
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1answer
858 views

Configure GRUB on XEN VPS

I have a xen VPS with debian 7 x86_64 installed on it. The operating system comes with GRUB2 installed on it. The problem is that while runnnig apt-get update apt-get upgrade -y GRUB says The GRUB ...
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327 views

Debian Wheezy hangs before GRUB menu after successful install on Dell C-Series Server

I've just installed Debian Wheezy on a Dell C-Series Server w/o any problems. However, at first reboot, I don't even get a GRUB menu. So I guess it's a problem with where GRUB was installed and maybe ...
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1answer
619 views

Text Mode Installation Of Ubuntu Server 13.10 With No Graphical Screens At the Installation Time [closed]

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? ...
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1answer
678 views

Grub2 w/ RAID5 and btrfs “error: unknown filesystem”

I have a Virtual Machine (in ESXi 5.1) running Ubuntu Server 12.04. When I try to boot my system I grub2 tells me "error: unknown filesystem". I've tried booting a Live CD then reinstalling grub from ...
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1answer
629 views

How do I install Grub2 on the first hard drive but Ubuntu on the second?

I want to install the OS (Ubuntu 12.04) on the second hard drive, but I'm unable to access the BIOS so I must install Grub on the first hard drive. How do I install Grub on the first hard drive, and ...
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40 views

How to extend /boot which is not on lvm

I have a machine with 100 mb boot partition but for installing new kernel with other module it needs additional 50 MB. How can i extend it its not on LVM. If i attach new disk and copy whole content ...
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362 views

Ubuntu 10.04 Server stuck at grub prompt

I have a virtualized server running 10.04 LTS that is no longer booting. We had a number of issues with our SAN that abruptly disconnected the storage from the virtual machine infrastructure and ...
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2answers
1k views

Grub2 reports physical volume pv0 not found on server non bootable anymore

I first installed my ubuntu server (11.10 amd64) using lvm but not fully mastering the concept of it. I think that's partly what made the mess of partitions on my two disks (seems to me). I installed ...
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86 views

Single drive LVM to RAID6 LVM

I cloned my entire LVM volume group from a single drive to a RAID5 array with 3 disks. The VG is formed by these logical volumes: root swap home ... and other volumes of some XEN virtual machines. ...
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1answer
724 views

How do I get rid of my duplicate GRUB entries? (Ubuntu 12.10, RAID1)

I have a Dell R300 machine running Ubuntu 12.10: $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 12.10 Release: 12.10 Codename: quantal $ uname -a ...
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1answer
552 views

How do I use memtest86+'s “badram” output with GRUB2? [closed]

So after a while of things randomly crashing, I let memtest86+ run overnight, and it found errors. I enabled the "badram" error output, but every few seconds it shows me a differing selection of ...
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491 views

grub boot failed after upgrading to ubuntu 12.04 LTS

no such disk error occured. I tried to format and reinstall 12.04, the problem remained. I also repaired with boot-repair, the problem remained. http://paste.ubuntu.com/1224005/ is url of the ...
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1answer
190 views

How to make a bootable USB out of my VPS?

I copied a backup of my entire VPS (Debian on OpenVZ) on a USB drive, and want to boot from this USB to test something on my server (in fact its duplicate). However, there is no nothing in the boot ...
4
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1answer
12k views

How to force Debian to boot new Kernel?

I'm running Debian 6, Debian GNU/Linux, with Linux 2.6.32-5-amd64 under Grub2 ( 1.98+20100804-14+squeeze1) on a remote system (no possibility to view the pre-boot messages). I compiled and installed a ...
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1answer
895 views

Upgrade grub to grub2 with MD RAID

I have a machine running Debian 6. Because of some recent changes, I tried upgrading to Grub2 (yes, grub legacy was installed by default). Everything went well (chainloading, reboot) until I started ...
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1answer
188 views

How do I correct the kernel version loaded by Grub2 in Ubuntu 12.04

I have a linux vps running Ubuntu 12.04 and when I run uname-r it replies: paul@webforms:~$ uname -r 2.6.32.33-kvm-i386-20111128-dirty paul@webforms:~$ sudo grub-install -v grub-install (GRUB) ...
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1answer
152 views

grub2 failing to detect md0 for /

I recently set up a raid 1 array. Both / and /boot are on md0 (sda, sdb). everything was working when it was in degraded mode before I synced the two disks together. It was booting from grub2 on ...
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1answer
618 views

Using Facebook's Flashcache on root partition (/)

I'm tring to implement Flashcache for a root particion for an ubuntu box. There is an excellent doc how to do this in flashcache: https://github.com/facebook/flashcache/blob/master/README-DKMS My ...