GRUB (GRand Unified Bootloader) is a multiboot bootloader from the GNU project. This tag is for questions relating to the legacy version of GRUB. Use the GRUB2 tag for questions dealing with GRUB2, a rewritten version.

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Install bootloader for Windows 10 after Ubuntu installation

I installed Ubuntu on an external drive following a tutorial and the tutorial said that I had to install the bootloader into the external drive. After the installation finished I could boot to Ubuntu ...
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72 views

Manual GRUB installation on USB: Filesystem is unknown

I'm trying to manually install GRUB on my USB pendrive. I do the following steps: I check whether the partition table is correct: sudo fdisk -l I get the following output: ... Disk /dev/sdb: 2 ...
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grub can't boot windows correctly

I have my Laptop (Thinkpad Edge e540) configure to dual-boot Windows 8.1 and Ubuntu15.10. When I installed Ubuntu I selected /dev/sda1 for bootloader installation and made a separate partition for ...
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Grub is in unusable state since w10 update

I am on a Vaio laptop with Debian Jessie / W10 dual boot and Grub 2.02~beta2-22+deb8u1. Since W10's latest update something weird happened to my grub-efi. When I boot my computer I get this error ...
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2answers
115 views

How to boot Ubuntu from BIOS wakeup and otherwise boot Windows

I have a dual boot system. My Ubuntu partition needs to boot automatically on BIOS scheduled wakeup (and wakeonlan if possible) Otherwise I want to boot into Windows by default. (power button) How ...
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1answer
93 views

How do I fix my MBR after removing dual-boot OS?

I have a PC which I cannot boot into anymore. I really really don't want to re-install the OS on it (I don't want to lose the data and, besides, it's Christmas week...) OK, so the PC has an SSD which ...
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324 views

No GRUB boot menu after installing Kali Linux on another drive for dual boot

I have a ASUS X551MA. I have 444 GB of storage space. I partitioned it so that I had 346 GB for my Windows OS and approximately 100 for my Kali Linux dual boot. I entered my BIOS by pressing F2 and ...
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61 views

PC boots into GRUB rescue/ Live Cds will not start

Ok, so this is kind of two issues at once. So, I was thinking about reinstalling Windows alongside my Linux install. I was in the recovery partition, but I changed my mind and hit cancel. When I did, ...
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70 views

How to restore Windows 10 from grub rescue?

My Pc has Ubuntu and Windows 10 (initially was 7 , upgraded to 10) It has entered rescue mode. I want my windows 10 back. And I have my important work in that. I don't bother loosing my Ubuntu. I ...
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36 views

Re-installing MBR (Master Boot Record) on Windows 7

I have GRUB installed on MBR for dual booting with GNU/Linux. However, now I want to delete my linux partition, and go back to using Windows 7 MBR. How do I re-install MBR while logged on Windows 7, ...
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1answer
1k views

Windows 10 and Linux Mint 17.3 dualboot breaking

So I fixed my previous question by getting a valid UEFI installer disk and completely formatting my SSD. I installed Windows 10 on half of it and installed Linux Mint 17.3 afterwards following this ...
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33 views

How to (safely) install Windows 10 on a Linux system

I have Linux (Arch) only system with a spare partition that I'd like to use for Windows 10. It's a notebook with UEFI. I remember I had some trouble back then when installing Arch because of UEFI. I ...
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337 views

“Reboot: power down” issues in Debian Jessie

So, the shortish version: My system will no longer power down after I issue a shutdown command (either from within KDE or on the command line, or it would seem Windows), I see the line "Reboot: power ...
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51 views

tty resolution breaks down after suspend & resume on Linux

I am running $ uname -sr Linux 4.0.5-gentoo with an Nvidia GeForce 750 Ti card and $ eix nvidia-drivers [I] x11-drivers/nvidia-drivers ... Installed versions: 355.11-r2^msd(01:51:54 04/...
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27 views

Booting Linux from pendrive very slow

I installed the newer Debian Jessie to my pen drive using VMWare Workstation. When used with VMware the Os works fine and fast. But when I try to boot my laptop using the pen drive, it takes 20 ...
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114 views

Mactel Fedora 23 - Debugging Slow EFI Boot

I recently installed Fedora 23 on my Macbook4,1 (early 2008 model). After the white screen/apple sound at boot, I see a black screen with an underscore cursor for about 10-15 seconds before the Grub ...
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22 views

Ubuntu and Win 8.1 DualBoot with default Windows booting

I am a proud owner of Asus ux32ln with 128GB SSD drive. I want to install Ubuntu as my secondary system (work, studies and stuff). So what I want to achieve is to install Ubuntu that way that windows ...
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39 views

grub fails to find btrfs-filesystem after adding new devices

Having my server (Ubuntu 15.04) equipped with two 1TB HDDs in raid1, I added yesterday two new 4TB HDDs. After adding those with btrfs device add ... I rebalanced the system with btrfs balance ...
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129 views

How do I migrate Windows 10 and Grub to a new Hard Drive?

I have two drives: C:, which contains a Grub bootloader and Windows 10, and D: which contains an NTFS partition and also all my Ubuntu partitions. I would like to replace my C: drive with a new (...
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1answer
163 views

Arch - GRUB with dm-crypt LUKS on LVM

The last time I had to install Arch was a year or so ago. Grub always gives me the most trouble but I prefer it over syslinux. HOW CAN I GET GRUB TO RECOGNIZE MY ENCRYPTED VOLUME? I get the GRUB ...
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2answers
57 views

GRUB boot error rescue

Recently created a Linux/windows 10 dual boot and something went wrong.... every time i boot up my PC it brings me straight to GRUB rescue and i am unable to type or access the BIOS menu (i have tried ...
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41 views

Shift key doesn't work for GRUB boot loader

I have absolutely no idea on how to get to the GRUB loader. I have an iMac with Ubuntu single-installed(if that affects anything). I tried using shift and right-shift on bootup, and I get an infinite ...
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2k views

Windows 10 ISO in Grub2 Multiboot

I'm attempting to create a multipurpose AIO USB stick for everyday use. So far I've been able to get Mint, Tails, And Hiren's boot cd all successfully working off of one device similar to the tutorial ...
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1answer
2k views

Repairing bootloader for kali linux 2.0

I'm trying to repair the boot loader for kali 2.0. I'm not sure what caused it but it doesn't show up in the bios anymore. I found this code: mount /dev/sda3 /mnt mount --bind /dev /mnt/dev mount --...
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Need explicit steps on how to prevent “GRUB RESCUE” issue when installing dual-boot Ubuntu

Now, there are many questions on how to fix this.My question is how to prevent it from happening. Currently, I have 2 hard disks. The first one has only Windows 7 Home Premium partition C: while the ...
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102 views

Cant boot FreeBSD 10.1 using grub2

I installed FreeBSD 10.1 on a machine that has Xubuntu already. The installation completed successfully but im not able to boot it. On my grub boot screen i get only 2 options: ubuntu and advanced ...
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1answer
130 views

OSX won't boot to USB with persistent Arch Linux installed, while Windows will boot to it

When I hold the C key on startup on OSX Yosemite 10.10.5 (macbook pro retina 2015 with force touch), it doesn't boot to the USB. Holding alt/option doesn't show the USB drive, and changing boot order ...
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1answer
59 views

Places or books to start learning PXE booting [closed]

I am currently playing around with PXE booting and PXELINUX/SYSLINUX. I have tried LTSP , thinmachine, FOG project and some others. Currently I am trying to understand how PXELINUX is working under ...
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1answer
32 views

Boot Windows install environment using grub?

I work as a computer repair technician and we have every Windows install disk under the sun for when we need to reinstall whatever of the myriad Windows versions the customer in question may happen to ...
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47 views

Where to find docs about multiboot2 cmd in grub2?

GNU docs almost nothing about multiboot2 command (although I could find linux, boot commands in the 14.3 The list of command-line and menu entry commands section), and enter link description here ...
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55 views

btrfs mounts wrong subvolume on boot

My system uses btrfs for its root volume, with daily snapshots. I'm trying to roll back to a recent backup, but it persists in mounting the same subvolume on boot even though I updated the default ...
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1answer
27 views

Asus X58C running Vista Basic cannot start up after installing Ubuntu and other messing

I installed Ubuntu not really knowing what I was doing. For a while, I could run either Ubuntu or Vista. I wanted to get rid of Ubuntu, but didn't know how. Don't know what I did, but I get error no ...
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1answer
66 views

How to boot from USB flash via EFI?

I have setup the following partition table on flash-drive: Disklabel type: gpt Device Start End Sectors Size Type /dev/sdb1 2048 34815 32768 16M EFI System /dev/sdb2 ...
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15 views

Grub not booting correct Windows

I recently installed a SSD and cloned my C: onto it. When I select the SSD Windows boot (sde1) in the grub bootloader, it still boots up the old Windows boot on sdc2.
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1answer
57 views

Can't access new partition via boot menu

I created a partition on my hard drive from about 23GB of empty space via Windows Disk Management in Windows 10. I then loaded up an Elementary OS Freya live USB and installed Elementary OS on that ...
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34 views

dd'ed the partition my debian was running on, now I get 'unknown file system'. how to make the (surviving) files accessible again?

details: Wanted to create linux boot stick with dd command (1,1 GB iso) Copy paste mistake led to dd'ing this iso to the partition running my debian jessie (sda1) After reboot I get 'unknown file ...
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18 views

UEFI Dual boot: can't see GRUB. In legacy mode boots Linux, in UEFI mode boots Windows [duplicate]

I have a UEFI laptop that came with Windows 7. Now I want to add Linux Mint 17, putting it in dual boot. I put my PC in Legacy Mode instead of EFI mode, shrunk Windows partition and installed it by ...
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1answer
71 views

GRUB menu edit protection only

I set up the GRUB password protection on my Ubuntu LTS 14 64bits. To do that I generated a hash of the password with grub-mkpasswd-pbkdf2. Then I edited /etc/grub.d/40_custom to add those 2 lines: ...
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47 views

Grub-2 not booting Windows

I have openSuse 42 and Windows 8. After a clean installation that worked very well (even dealing with UEFI), I just noticed that windows does not boot. I took a picture of the error I get . This ...
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57 views

Vboot vs open source grub?

I'm trying to use vboot from vmlite to boot my computer from a vhd and there are two downloads available the trial version of vboot and the open source grub used in vboot. What is the difference ...
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46 views

Linux Mint startx won't load after update

i recently updated my linuxmint. I do not remember which version i was using and to which i updated, most probably it was updated to the latest. After finishing the update, i rebooted my PC and it ...
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219 views

How to fix a messy GRUB config with Windows 10 and Ubuntu 15?

This is my set up - I have an SSD with Windows 10 and Ubuntu 15 dual booted, and an additional HDD which I use for extra data. Every so often I will get this error when selecting Windows 10 from the ...
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16 views

How can restore Windows 8.1 after installing KALI Linux?

I've installed Kali Linux over Windows 8.1. Following listing presents my disk layout. fdisk -l -u output Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 sectors Units: sectors of 1 * ...
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1answer
600 views

Booting Fedora 23 after installation fails

I just installed the Fedora 23 from the official iso. Installation succeed and computer reboot. But Fedora starting to load (just after grub selection) it write on my screen upper the loading bar: ...
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1answer
26 views

How to select grub entry via PS2 port?

We want to output the grub entry to serial port and select the grub entry on another machine via serial port. We have two machines. For the machine with built-in serial port, we followed the ...
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123 views

After Windows 10 upgrade + grub fix Windows takes too long to boot. (elementary os dual boot)

I had Windows 8.1 installed (+ elementary os) and boot time was normal. Then I upgraded to Windows 10 and grub disappeared. I fixed it by using this command: "bcdedit /set {bootmgr} path \EFI\ubuntu\...
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1answer
24 views

Grub FlipFlop Boot

Is it possible to configure grub2 boot loader to flipflip boot between two different OS? MY set-up is that I have a beefy lab computer that is by some people to run Window 10 and others Linux (Suse), ...
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0answers
404 views

Grub not showing after installing Elementary OS alongside Windows 10 [UEFI]

I've tried to install elementary OS alongside Windows 10 in a UEFI machine. I first did it with Secure Boot enabled, using the "something more" option. I configured the root and swap partitions as I ...
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2answers
196 views

How to remove 'ubuntu' option from os selection menu?

I recently installed Ubuntu 15.04 on my Dell Vostro 15 3546. Its has Windows 8.1 installed. I divided the 500 GB HDD in to 2 and installed Ubuntu in one partition. Due to some error in installation I ...
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3answers
250 views

Can I upgrade to Windows 10 if I got a broken Windows 8 installation?

I had 2 partitions, one was for Ubuntu Linux, (100 GB) and one was for Windows 8.1 (400 GB). I am dual-booting it with GRUB. Since I installed Ubuntu, it simply broke. My question is: How can I ...