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

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1answer
30 views

How do I replace a disk with LUKS on LVM2 - no raid, no span

I have LUKS on LVM (LVM Partitions created first, then each partition is encrypted separately, following this guide on Arch Wiki). I am using two volume groups, and each is isolated to a drive. This ...
2
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1answer
67 views

Default kernel boot parameter on Red Hat 6 / CentOS 6

I would like to understand if, and how, it is possible to configure default kernel boot parameters on Red Hat 6 / CentOS 6 (grub legacy bootloader). I very well understand how to manually configure ...
0
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1answer
89 views

How to fix when grub no longer mounts the boot partition at start up?

This system has a boot partition on a dm-raid device. I updated the system by standard methods from an older Ubuntu to the latest LTS. Now, if the kernel is updated by "apt-get upgrade", the new ...
2
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1answer
44 views

How to boot to shell with Solaris?

I would like to boot Solaris to shell (root prompt) directly for recovery purposes. On linux I would pass a kernel option init=/bin/bash and it would directly boot me into shell without asking for ...
1
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1answer
34 views

Install grub on mounted kvm image?

I am trying to mount a KVM image on the host machine in order to fix a grub issue however seem to be going wrong somewhere. I have tried the following steps: mount -o loop,offset=32256 ...
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1answer
101 views

framebuffer loads under Linux, but not Xen

I recently built a Debian "Wheezy" system, which booted via GRUB to a non-framebuffer console, printing Console: colour VGA+ 80x25 during boot. To /etc/default/grub I added GRUB_GFXMODE=1920x1200 ...
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1answer
146 views

Empty /boot/grub/grub.conf of a remote server, how to recrete it from recovery?

My remote server (running CentOS 6.6 x64) can't boot anymore. Using the emergency recovery (a LIVE CD) i can actually look that /etc/boot/grub/grub.conf and it's empty (0 bytes). I don't know why, ...
3
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1answer
43 views

How to keep specific old kernels around after a yum update

I know that in CentOS 6.x, you can put the following line in /etc/yum.conf which tells yum to keep the last N kernels (by default this is set to five): installonly_limit=5 However, there are cases ...
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0answers
38 views

Grub CLI Arrow Keys Don't Work With IPMI SOL

When I am using the Grub CLI via IPMI sol I am unable to use the arrow keys, as well as some keys such as delete. What happens when I press the Left key I get random 'D' characters appearing, even ...
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0answers
27 views

Using grml with btrfs

I'm trying to boot an ISO using grml and grub on a BTRFS root. However, after selecting the boot option from the menu grub (or some subsequent loader) fails to find the iso ...
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0answers
48 views

Why is update-grub unable to find my root device?

I created a new root partition and I am trying run update-grub inside a chroot. I bindmount the following for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; done update-grub ...
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3answers
168 views

Modifying kernel cmdline in Ubuntu

I have a number of systems on which I need to modify the kernel cmdline, adding a few options. At the moment I do it using the following procedure: Open /etc/default/grub Modify ...
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0answers
88 views

grub: Booting Ubuntu off /boot in LVM, broken after upgrade

I have servers I want to upgrade remotely and headlessly from Ubuntu 12.04 LTS to 14.04 LTS. This upgrade has to happen via script, with no interaction. The do-release-upgrade command exits cleanly, ...
0
votes
1answer
55 views

GRUB hangs on emergency boot

I am trying to get a server going and was extremely excited when I found out it would automatically boot if the power just suddenly stopped. So if i were to unplug the server while it was still ...
0
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2answers
2k 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 ...
2
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1answer
565 views

Cannot install grub, segmentation fault, unable to identify filesystem, superfluous RAID member, found two disks with same index — Debian 7

A server was recently transported from location A to B, a long journey that took six months. Things have gone wrong due to nothing being labeled prior to shipment. Yes, I know --- it was done by ...
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2answers
427 views

Can't get my proliant N54l to boot from USB

I was trying to install ubuntu 14. onto a usb stick. It booted fine from the USB and I went through the process for a while until I got to the partitioning bit, I was thinking maybe the install was in ...
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0answers
134 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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2answers
525 views

Linux xen directly boot windows domu?

I have the following situation: got a new notebook with Windows7 pre-installed (sda1 with boot partition, actual OS in sda2), one physical disk (sda) created an extended partition (sda3), inside ...
0
votes
1answer
310 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 ...
1
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1answer
376 views

SuperMicro Superblade fails to boot from hard drive

Following issue. I have a number of Superblades with LSI MegaRAID SAS 9240-4i cards. One card per server. All of them use the latest firmware (20.13.1-0176) as of this writing (as per the LSI ...
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3answers
2k 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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0answers
127 views

Verify architecture of kernel file

Note: I am NOT interested in the currently running kernel, but on a kernel that I am going to boot and which is in a file in the filesystem. I am going to boot a new kernel. I have prepared grub.conf ...
1
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1answer
157 views

Where to install GRUB 2 boot loader?

I have: sda and sdb which partitions is forming mirror RAID md0 md1 md2 md3 During update process, I was prompted where to install GRUB boot loader - on sda, sdb, md's or all together? What ...
12
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2answers
743 views

Is there a way to create a “one-time” boot entry in grub?

I have the following issue: I have a small server (Debian based) to which I can connect remotely (VPN/SSH connection). Now I want to change some boot options (in fact I want to migrate my root file ...
2
votes
2answers
1k views

Linux RAID 1: How to make a secondary HD boot?

I have the following RAID 1 on a Centos 6.5 server: # cat /proc/mdstat Personalities : [raid1] md0 : active raid1 sdb1[3] 974713720 blocks super 1.0 [2/1] [_U] bitmap: 7/8 pages [28KB], ...
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1answer
178 views

Regular apt-get update broke grub

I ran a regular update (aptitude safe-upgrade) on my wife's server yesterday (a Hetzner root server with Hardware RAID) and the server hasn't booted properly since. I'm able to boot the server using ...
0
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1answer
303 views

Grub giving Error 2: Bad file or directory when I try to locate the kernel

I'm trying to boot a VM with grub-legacy and I'm getting a grub prompt. If I run root (hd0,0) it says Filesystem type is ext2fs, partition type 0x83, but then if I do kernel /TAB it says Error 2: Bad ...
0
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0answers
130 views

zfs checksum verfication failed, solaris booting failed

Looks like my solaris 10 got hosed overnight for unknown reason. I get below error while booting and also when trying to cat menu.lst file in grub. Hard disk is being detected by ubuntu so it may not ...
0
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1answer
112 views

Did grub updating bring my server down?

I have an Ubuntu 12.04 server. Last night I installed a few updates using apt-get dist-upgrade, including grub, and rebooted. After rebooting, I couldn't boot into Ubuntu. I just get a big flashing ...
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2answers
691 views

grub.conf missing initrd path after kernel update

I updated a server this morning and the latest kernel panics during boot. Upon review of the grub.conf file I found the initrd path was missing. Is there a way to fix this issue? Or should I remove ...
1
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1answer
194 views

CentOS only detecting 50% of ram on IBM Server

I have IBM server with 16 GB RAM installed. Initially it showed 16 GB with free | grep Mem | awk '{print $2}' but now it shows only 8116136 but it must show 16439208 When I do dmidecode ...
0
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1answer
61 views

Use old raid drive as boot device without data loss

There were two disks in sw-raid. There were /dev/md1 as swap, /dev/md2 as boot and a /dev/md3 with ext4. The sw-raid was disabled by stopping and removing mdadm and then zeroing the superblock on ...
1
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1answer
565 views

VM's Grub menu invisible with XenServer 6.0.2?

I have a dual-boot VM on XenServer 6.0.2 but grub just shows up as a black screen. I can still make a selection and such, but it's just a black screen in the XenServer console. Any ideas on how to ...
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0answers
93 views

Debian server does not get to grub on boot (possible raid issue)

First a bit of backstory. I'm working at a small business that runs their own web/mail/file server. The server is running on Debian lenny and I have been trying to update it, I ran into a problem with ...
2
votes
3answers
804 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 ...
0
votes
1answer
2k views

Stuck at grub prompt after a default CentOS 6 installation

I am having a very strange problem installing CentOS 6 that I've never encountered before. I've followed these same steps thousands of times before, but within the past couple weeks I've had two ...
0
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2answers
452 views

removed files from /tmp/ directory - can't login anymore

I'm a system integrator(evidently noob), and today i've made my first scan with rkhunter, a tool that look into the system for check the presence of rootkits. After that scan i -foolishly- decided to ...
0
votes
1answer
473 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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2answers
1k views

Which vmlinuz and initrd.img should I use for 'headless' CentOS installation?

I am pondering reinstalling a CentOS Linux server remotely, by installing CentOS' installer into /boot (GRUB) as per this tutorial: ganesh.me: Install Linux Servers Remotely I notice that there are ...
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0answers
131 views

Getting 'out of memory aborted' on booting

I am trying to install ubuntu 12.04 ~ 13.10 on my old machine with MegaRAID 9240-8i. Every time I finished installing and restart, the screen just popup out of memory aborted. At first I thought that ...
1
vote
1answer
2k views

Grub install failing on Hardware RAID with LVM

I have a SuperMicro box with an Areca RAID controller installed. The RAID controller is configured for RAID 6 + Hot Spare. I am attempting to install Ubuntu 12.04 LTS. I set up LVM with separate ...
1
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2answers
54 views

Automatic OS rotation using GRUB

I have several test servers that perform unit tests and hardware tests on some PCI and PCIe boards my company produces. These servers are multi-boot with a number of various Linux distributions and ...
1
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1answer
356 views

KVM virtual machine boot messages

Just wondering if anyone knows of a way to stop the following boot messages with a centos 6.5 vm created with qemu-kvm When I start the vm there is a slight delay as the vm posts the following boot ...
2
votes
1answer
1k views

How to configure GRUB loader after apt-get upgrade on Ubuntu 12.04

I have a box with Ubuntu 12.04, and just did a apt-get upgrade. I'm presented with a dialogue to update my GRUB bootloader, but with the following message: The GRUB boot loader was previously ...
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0answers
550 views

grub on debian wheezy doesn't recognise mdraid

We're having a really strange problem when trying to boot from an mdraid on Debian Wheezy. All references online that I can find tell me that grub 1.99 (which is part of Debian Wheezy) should have no ...
0
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1answer
894 views

Why is my machine not showing anything when booting?

I'm using Ubuntu Server 11.10 x86, and after I make my normal selection (Ubuntu, with Linux 3.0.0-12-generic-pae) from the GRUB menu, the screen just goes blank - there's not even a cursor showing up. ...
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0answers
53 views

CentOS grub.conf template?

I want to add some parameters to the kernel line in grub.conf, but I want to make sure that when the kernel is updated that those parameters persist. How is the format determined? Is there a template ...
0
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0answers
39 views

What is the issue with the boot setup on this raid array?

After a secure erase of /dev/sda (Samsung 840 Pro) I had to setup grub on /dev/sda2 (for some unknown reason the /boot partition is the second one). So I ran something like this: grub root(hd0,1) ...
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0answers
583 views

How can I determine if nohz=off (CentOS 6.4 64bit - Hyper-V)

I've edited /boot/grub/grub.conf and added nohz=off to the command line of the default kernel. I do not see any difference, kernel is compiled with 1000Hz, but when I test with the following tool: ...