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

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0
votes
2answers
28 views

Linux + how to clean /boot and stay only with the current kernel version files

Under /boot we have the following files ( red-hat Linux version 6.6 ) cd /boot # ls -ltr drwx------ 2 root root 12288 Oct 15 2015 lost+found -rwxr-xr-x 1 root root 4152624 Oct 15 2015 ...
2
votes
2answers
76 views

how to configure the grub.cfg file on redhat 7 in order to boot from specific kernel

In Red Hat EL versions 5 and 6 we can easily to update the /etc/grub.conf in case we want to change the kernel by default variable For example , grub.conf on redhat 5 default=0 timeout=5 #...
0
votes
0answers
4 views

Converted .VHDX to VHD using Virtual Box vboxmanage Grub broken

Using vboxmanage.exe i converted .VHDX to .VHD. Now, when I boot using virtual box I get see screenshot. Is the error because of the conversion, the UUID don't match? I cannot boot from LIVE distro ...
5
votes
5answers
8k 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: warning:...
0
votes
1answer
49 views

Why does my server not boot after moving root fs, inside LVM, to raid?

I'm trying to move my root partition to raid based physical volumes, and I seem to be failing. The procedure I'm using is somewhat complicated, but that's because my hosting provider has very limited ...
2
votes
2answers
3k views

CentOS 6 Xen guest fails to boot after 'yum update'. Kernel?

I Seem to be having an issue with a Xen guest not booting after a yum update. DomU Configuration: #kernel = '/boot/solus-vmlinuz' #ramdisk = '/boot/solus-initrd.img' bootloader = '/usr/bin/...
1
vote
1answer
1k 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 website)....
4
votes
1answer
2k 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 ...
0
votes
0answers
71 views

Change kernel of Centos OVH

I'm using a server of OVH with OS centos7. OVH has its own linux kernel: 3.14.32-xxxx-grs-ipv6-64 Now I try to configure another Centos7 kernel. I installed the other kernel(s). yum install kernel ...
0
votes
0answers
8 views

Upgrade to Windows 10 fails on Windows 7 / Ubuntu dual boot machine [migrated]

My attempts to upgrade my Windows 7 install to Windows 10 consistently fails with Error 800703ED. I strongly suspect that this is caused by by dual boot setup. I have inserted info re my disk/grub ...
0
votes
0answers
45 views

Custom centos6.7 iso does not boot in uefi

I have created a custom CentOS 6.7 iso and in BIOS it boots and installs my application successfully. When I configured my VMware to boot in UEFI i get this error: -EFI Virtusl disk (0.0)... ...
2
votes
0answers
17 views

How to modify the grub default timeout for CoreOS?

I am trying to reset the root password for my CoreOS machine for which I need access to the machine's grub. However, I don't see the grub at all and the machine boots up. I am on CoreOS stable (1010.5....
0
votes
0answers
13 views

not able to reinstall grub boot loader in rescue mode

In my centos machine /boot/grub/grub.conf file got deleted. So i entered into rescue mode and tried to reinstall grub from there. using below steps: linux rescue chroot /mnt/sysimage /sbin/grub-...
6
votes
3answers
3k views

Use GRUB/GRUB2 to PXE boot OS image

Asked this in stackoverflow but they recommended I post this here: Here is the situation I am in: I currently have a Windows drive that boots XP. The BIOS does not support PXE booting so this is out ...
0
votes
0answers
28 views

Amazon ec2-bundle-vol - unbootable image

Here are the steps I've done: Source: Enterprise Linux 6 running on EC2 Target: Centos4 Image to run on EC2 Created a new 10GB volume, with ext3 FS and mounted on /centos4 Created directories for ...
2
votes
1answer
34 views

GPT, grub and mdadm. sda drive replaced, raid rebuilt in recovery mode, but now server won't boot

This is how partition table loooks like: (parted) print Model: ATA TOSHIBA DT01ACA2 (scsi) Disk /dev/sda: 2000GB Sector size (logical/...
35
votes
2answers
20k views

Damaged /vmlinuz and /initrd.img symbolic links after Kernel uninstall

OS: Ubuntu 8.04 LTS Server Edition We just rolled back an kernel update using the following command: sudo apt-get remove linux-image-2.6.24-24-server The uninstallation was successful, but it had ...
0
votes
1answer
28 views

issues booting fresh install of UbuntuOS

I have 2 hard drives on my server and i have previously installed CentOS on one of the hard drives(not sure which but i am guessing the second) I install fresh Ubuntu 14.04LTS on the first one i ...
1
vote
1answer
26 views

linux red hat + how to start as single user mode from grub

I have this in my linux machine grub> how from this I start the linux machine as single user mode? in order to update some file after boot
1
vote
0answers
30 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 ...
32
votes
2answers
35k views

How do I tell if grub is installed on a device?

How can I tell if grub is installed on a disk, and if it is what settings it has (noteably, what it has for the root parameter) I need to check a lot of disks in software RAID1 arrays to make sure ...
2
votes
2answers
8k 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 ...
1
vote
1answer
248 views

Is it possible and wise to put the grub bios partition on a software raid?

in a two disk setup /dev/sda /dev/sdb i created per disk 3 partitions bios_grub 1mb linux raid 512mb md0 (/boot - ext3) linux raid rest md1 (physical volume for lvm) the answer on http:/...
6
votes
4answers
3k views

Disable THP and THP defrag on CentOS 7 EC2 instance

I want to disable transparent_hugepage (THP) on a CentOS 7 EC2 instance, which is enabled by default: # cat /sys/kernel/mm/transparent_hugepage/enabled [always] madvise never # cat /sys/kernel/mm/...
1
vote
3answers
576 views

Converting Linux machine from XenServer to Hyper-V

I'm in the process of converting the last few on my XenServer VMs over to Hyper-V. The majority of them have been Windows machines and I've done a backup and restore using Windows Backup. For some of ...
1
vote
1answer
1k views

Linux xen directly boot windows domu? [closed]

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 ...
2
votes
2answers
3k views

Cant boot newly created mdadm software raid in Debian linux squeeze

Hello I have very strange problem creating swraid on Debian Squeeze Linux. I started creating RAID1 from existing standard instalation of Debian on single drive. So I bought new drive and started ...
1
vote
1answer
790 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
votes
1answer
79 views

Copy centos 6 modify mdadm raid 1 and clone to new mdadm raid 1 ssd

I have: Centos 6.7 grub-install -v grub-install (GNU GRUB 0.97) lsblk two new SSD 128gb Live usb with Parted_Magic_2015.03.06 /boot/grub/device.map # this device map was generated by ...
1
vote
0answers
308 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 And then: update-...
0
votes
1answer
3k 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 ...
1
vote
0answers
99 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 ...
0
votes
0answers
34 views

Ubuntu Server 14.04 kernel gives up before modprobe completes scan of eSATA array

We have a new server with Ubuntu Server 14.04 LTS and are trying to use our eSATA enclosures from our older 12.04 server. We have two 8 bay Probox eSATA enclosures and two 4 bay Probox eSATA ...
2
votes
2answers
1k views

Intel NUC5CPYH - Ubuntu Server 14.04.2 and 15.04 post-install crash

I've experienced this problem with Intel NUC model NUC5CPYH using both Ubuntu Server 14.04.2 and Ubuntu Server 15.04. After completing the installation (which in my experience is best done from an ...
2
votes
2answers
180 views

Debian software RAID1 is not working when I remove hard drive

I have been trying all weekend to get RAID working on an old server computer with the Intel ICH7 / ICH7-R SATA-II controller running dual hard-drive with RAID 1. After giving up in hardware raid, I ...
2
votes
1answer
141 views

Replaced SATA controller, software RAID (mdadm) stopped booting: grub rescue> no such disk

I have a relatively old server machine which has no SATA ports on the motherboard (Dell Precision Workstaion 650). Also have a cheap FakeRAID controller (VIA VT6421 Chipset) and two Seagate 3TB drives ...
1
vote
0answers
56 views

Cloudlinux, GRUB 0.97, software RAID, won't automatically boot

My server is running Cloudlinux as has a software RAID mirror (/dev/md2 made from /dev/sda and /dev/sdb) mounted on / It's been running fine, but after simulating a raid failure and rebuilding the ...
0
votes
1answer
38 views

EXTLINUX warns to install grub

While doing apt-get dist-upgrade on a Debian GNU/Linux Jessie EXTLINUX warned me that now was mandatory to install grub. The system was installed after an image not done by me: is it safe to ignore ...
1
vote
1answer
1k 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 ...
2
votes
1answer
40 views

grub 0.97 (legacy) confusion between menu.lst and grub.cfg

I've been looking through documentation but am still utterly confused. I'm used to using menu.lst to configure grub but grub.cfg seems to be the way to do it for grub2. My Debian 8 server has grub 0....
0
votes
1answer
6k 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
votes
0answers
73 views

AWS pv-grub don't see config file

I created ami from scratch: ec2reg -n centos7 -b '/dev/sda=snap-96a520e3' --kernel aki-499ccb20 -a x86_64 but pv-grub can't find config file: Thread "Idle": pointer: 0x20f0002050, stack: 0x2070000 ...
0
votes
1answer
7k views

Solaris10 x86 mirror. Making second disk booteable when failure

Did a mirror (RAID1) with Solaris 10 in x86. Everything OK. Now, I´m trying to make the second disk booteable, this is: from grub or in case of failure of disk1. I edited /boot/grub/menu.lst: #------...
5
votes
3answers
727 views

No volume groups found - CentOS

I have migrated a CentOS 5.11 server from VmWare to Hyper-V and when trying to boot the server. I'm getting the following error messages: "No volume groups found" ""VolumeGroup00" not found" and ...
0
votes
0answers
93 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" TYPE="...
0
votes
1answer
85 views

How to save output from grub-md5-crypt to a file ?

I am using Cent OS 6.5 and I want to save the generated output and md5 hash from grub-md5-crypt command to a file. The grub-md5-crypt command asks us to set a password. I want the password(which I ...
2
votes
1answer
3k 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 ...
0
votes
1answer
35 views

How can I modify the bootloader config on debian 7

I want to install Debian 7 remotely. I've followed this tutorial: https://wiki.debian.org/DebianInstaller/Remote How can I execute Step 8? I found the command update-grub but I don't know where to ...
0
votes
1answer
71 views

Deleted MBR on virtual machine on purpose, but entries are preserved

I'm playing with Master boot record. I decided to delete and restore it on my vmware machine. With Ubuntu LiveCD I'm trying to erase partition entries and signature with command: dd if=/dev/zero of=/...
0
votes
1answer
261 views

Debian/Installer Preseed Remove Post Install Kernel Options + Multi NIC Preseed Tip

In light of recent automation trends, I would like to be able to fully automate an install of Ubuntu. My my first problem was auto selection of the bootif with multiple NICs break Ubuntu/Debians ...