Grub (GRand Unified Bootloader) is a bootloader package.

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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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1answer
27 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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How do I force a display resolution on load with Debian Wheezy? [migrated]

I tried adding vga=773 to /boot/grub/grub.cfg on the same like as the kernel is invoked, but it still loaded up in 1600x1200 which puts my ipKVM out of sync.
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30 views

mdadm/grub2/lvm boot failure if all drives are physically connected

Weird problem here. I've got a Debian 7 server (quad core, 32GB RAM) that runs a whole bunch of VMs. The main boot drive is a RAID 1, with an LVM volume group called System, which contains a bunch of ...
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1answer
132 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
136 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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1answer
939 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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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
234 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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3answers
1k 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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122 views

Change “boot VGA” device on Linux

I have two graphics cards (Radeon HD 5750 and Radeon X800 GT/SE), 5750 is in the first PCI-Ex slot, so it's used as the primary graphics card by BIOS and subsequently by grub2, Linux and X server. ...
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1answer
161 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
216 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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107 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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25 views

No Boot after Raid6 grow - Shows Grub Rescue

I have a Debian Wheezy with SW Raid6. I growed the Raid from 7 to 5 Disks and all looks good. I rebooted and the system didnt start file not found and grub rescue is shown. ls shows all disks and mds, ...
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3answers
613 views

SOLVED: 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
365 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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208 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
272 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
376 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
273 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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301 views

Ubuntu 12.04, after reboot, ping but don't have any service up ( ssh / apache )

I need a little help, I just reboot a ubuntu server 12.04 without any special modification, it doesn't start anymore, I have a ping return but connection refused on SSH and apache is not started Here ...
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34 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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260 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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1answer
808 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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78 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
614 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
364 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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396 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
122 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 ...
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1answer
6k 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
696 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
173 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
129 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
455 views

Using Facebook's Flashcache on root particion (/)

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 ...
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101 views

Grub2 Command Line Restarts On Any Command

I've been attempting to configure a software raid1 using a pre existing Ubuntu 12.04 install by following the guide here. I successfully completed step 4 but then couldn't get Ubuntu to boot into the ...
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1answer
83 views

Installed kernel not in /boot

I have a LAMP configured Ubuntu 10.04 LTS VM on my ESXi server. I've installed the "Virtual" kernel but only the original "Server" kernel is available at boot. ls /boot only shows files associated ...
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400 views

Grub2 won't install on fresh Ubuntu 12.04 LTS Server installation

I have a hardware RAID 1 which seems to be recognized find by the Ubuntu installer. I choose the "Entire Disk - Guided" partition strategy and accept the defaults, writing them to disk. When it ...
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2answers
1k views

Advanced configuration of Grub2 for RAID5 + Encrypted LVM where /boot needs redundancy

I recorded my complete installation until failure in case you have a question about the installation which I did not provide an explanation for below: http://www.youtube.com/watch?v=BVe5vja3keo ...
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1answer
483 views

update grub2 without hardware access (e.g. in a chroot)?

I'm writing a script that takes a master KVM image, converts it to VDI, makes a few changes to it, and offers it up for download. I need to update the kernel boot parameters for some of the newly ...
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1answer
4k views

Setup grub2 on a GPT software raid 3 TB HDD

I like to setup grub2 on a GPT softare raid 3 TB HDD. Number Start (sector) End (sector) Size Code Name 1 2048 1050623 512.0 MiB FD00 Linux RAID 2 ...
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2answers
1k views

How to boot GRUB2 so it mounts “root” on a different drive (remote server without kvm switch)

Summary: I created a copy of the root file system on a raid array (with one disk on it), and im trying to get the system to boot off that newly copied drive. Background: 2 disks of same size in ...
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1answer
2k views

Grub2 reports physical volume pv0 not found when probing/installing

I upgraded a Ubuntu Maverick to Precise server but I get the following error while updating grub: error: physical volume pv0 not found. Now, for my system I have /dev/sda through /dev/sde ...
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1answer
9k views

Ubuntu server, gpt partition table, mdadm, grub boot fail

Basic working system details: I used the Ubuntu 12.04 server CD to install a server. I have 4 disks. On all disks I did the following, similar to this howto : created a 2GB swap partition created ...
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3answers
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RAID6 mdraid -> LVM -> EXT4 root with GRUB2?

2012-03-31 Debian Wheezy daily build in VirtualBox 4.1.2, 6 disk devices. My steps to reproduce so far: Setup one partition, using the entire disk, as a physical volume for RAID, per disk Setup a ...
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1answer
3k views

How can I find out where GRUB was installed?

I need to find where GRUB was installed, for example, which drive/partition. Is it possible to figure out where it was installed?
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1answer
1k views

Unable to boot after updating to kernel-3.1.4-1 in fedora 16

I was using kernel-3.1.2-1 in fedora 16. then updated to kernel-3.1.4-1. after reboot now grub shows command prompt instead of boot menu. i tried to load manually with: set root=(hd0,msdos3) linux ...
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2answers
4k views

Run fsck -y everytime at startup on my main partition Linux

I have an embedded linux system. I use grub2 for the boot loader. I would like to run an fsck -y /dev/sda on /dev/sda every time it boots--even when the system had a power loss and the reboot command ...
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1answer
156 views

Package upgrade on Ubuntu raid server and grub setup issue

I have remote Ubuntu 10.10 server running on raid system. I did package upgrade yesterday night for security reasons. During the upgrade, grub installation screen appeared and asked me which partition ...
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3answers
2k views

How to install grub on multiple disks?

I have weird situation - order of disks as reported by BIOS, is different than order of disks that Linux sees. Which makes for problematic run - grub installs to sda, but bios boots from sdd or ...