GRUB2 is the next generation of the GRand Unified Bootloader (GRUB). Ubuntu has used GRUB2 as the boot loader since 9.10 (Karmic Koala). Commonly referred to as simply "GRUB".

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Ubuntu killed Window volume. How to reinstall window from Ubuntu

Ubuntu killed Window partition Hey guys, I have this trouble. At first my Lap has Ubuntu and Window. But the grub has crashed and the best way to save it was backup data and reinstall OS. I chose to ...
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1answer
45 views

Grub won't start Windows 10

I have had dual boot for a while now, having Windows 10 and Ubuntu 15.04. It was working perfectly. When I turned on the PC Grub would show up with Ubuntu and Windows 10 as options, both worked ...
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2answers
35 views

Windows 10 update ruined by Windows/Ubuntu dual boot

I had a Ubuntu/Windows 7 dual boot set up on my laptop. An updater tried to install Windows 10 in the middle of the night and now when I start the laptop, I get the grub rescue prompt. I tried this ...
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0answers
12 views

Grub boot from BIOS of Ubuntu

i need that you ask me about how to boot grub with two operatives system on the virtual machine. I´m ruuning with Windows 10 and Xubuntu 16.04 with UEFI configuration. Sudenly that Winddows 10 runs ...
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3answers
66 views

UEFI/legacy issue : Ubuntu alongside Win10

I'm pretty much new on Linux and was planing to make dual-boot for a long time now. My problem basically is that after I installed ubuntu (16.04) alongside my windows 10 it can boot if i set legacy ...
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3answers
10k views

Grub update warning in Ubuntu 14.04

I tried to update Grub so I run: sudo update-grub Generating grub configuration file ... Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported. ...
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1answer
16 views

Is it possible to install ubuntu 14.04 and boot as CSM ?

Is it possible to install ubuntu 14.04 and boot as CSM ? and what are the critical differences between UEFI and CSM boot for ubuntu ?
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1answer
38 views

Why Do I Keep Getting GRUB Command Line on Startup - Dual Booting Wins 8.1 and Ubuntu 14.04

I migrated data on my laptop's HDD which contains Windows 8.1 to my SSD and replaced the HDD with the SSD (My laptop has 2 hard drive bays btw). Currently, my Windows 8.1 and Ubuntu 14.04 are on their ...
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0answers
16 views

System wont regonize installation

I have Dell Vostro 15 and he wont regonize installation of ubuntu 16.04 or 14.04. I only have one system. I installed everything normal, after install he ask me to restart in order to make new ...
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0answers
32 views
+100

Error unknown command hwmatch

I'm getting "unknown command hwmatch" message on each boot after I installed Ubuntu 16.04 following this steps: https://gist.github.com/umpirsky/6ee1f870e759815333c8 in order to setup RAID0. Special ...
0
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1answer
11 views

how to recover my HDD partitions by ubuntu 16.04

Actually what I did,is I was trying to install Ubuntu 16.04. Unfortunately I selected 3rd option "Erase disk and install ubuntu with LVM option. It remapped my 3 partitions of HDD #1 Ubuntu OS ...
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0answers
38 views

Can I use a 64-bit system along with the 32 bit version of EFI?

Recently, I set up an Ubuntu Kodi-based home theatre system on a 2007 Intel A1176 Mac Mini. This is a 64-bit system with firmware that expects a 32-bit EFI. After some experimentation, I created a ...
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1answer
18 views

Grub 2 crypto modules prompt issue

I am using grub2 on an mbr disk (not EFI) to boot Xubuntu 16.04. I have sort of a specialized setup, as follows: /dev/sda - MBR - Grub2 installed /dev/sda1 - ext2 - /mnt/boot /dev/sda2 - extended ...
3
votes
1answer
8k views

How to Re-Add Windows XP to grub menu after Ubuntu 11.10 Re-install

Basically, I messed up my partitions and decided to do a full re-install of both Windows XP and Ubuntu 11.10 (I know that 11.10 is outdated, but I was planning to do an update to 12.04 as soon as I ...
0
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1answer
18 views

number of options of ubuntu keeps increasing after every restart.why?

my screen after starting and pressing F9 Have installed ubuntu along side windows 8 and also have run boot repair ,but have to press escape and F9 to boot ubuntu,number of options of ubuntu keeps ...
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1answer
28 views

What is the difference between Windows UEFI bootmgfw.efi and Windows UEFI bkpbootx64.efi?

Also help me by explaining why windows UEFI loader was first taking me to windows but now is redirecting back to this page:
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0answers
15 views

How can I make Windows go to sleep without causing problems after waking?

After installing Ubuntu in dual boot mode alongside Windows 10, Ubuntu isn't shown in the boot options when I boot up (HP firmware problem), but that doesn't bother me. What is really irritating is ...
0
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1answer
17 views

Broken boot after increasing disk size

My ubuntu server will not boot after I increased the disk size. I'm still very new to using/troubleshooting linux/ubuntu and im not entirely sure how I have managed to break the boot/grub so ...
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0answers
14 views

Cannot boot on windows 10 anymore and partition error

I installed ubuntu yesterday and had a lot of trouble in managing to start it up. Now it's working but I can seem to access to my windows 10 partition anymore, here is how it turned out : I ...
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4answers
33 views

UEFI install of ubuntu 12.04LTS failed on Windows 10 now can't get windows 10 back [on hold]

I've attempted to install unbuntu v12.04.3 LTS but it didn't quite go to plan. I don't have any windows recovery disks and I now just want to remove ubuntu from the system. I didn't partition the ...
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5answers
4k views

No option to choose between Ubuntu or Windows at startup; tried many suggestions already

Yesterday I used a live cd to install Ubuntu 14.04 on a computer already loaded with Windows 8. The Ubuntu install did NOT recognize any operating system on the computer, so I chose "something else" ...
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4answers
104 views
+350

grub2: update-grub failed to get canonical path of `none'

$ sudo update-grub /usr/sbin/grub-probe: error: failed to get canonical path of `none'. This is the situation I'm in after an interrupted upgrade from vivid to wily [edit] Further delving into ...
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1answer
20 views

Can't install GRUB 2 to /target when attempting to dual boot

I recently tried to install Ubuntu GNOME 16.04 on a separate partition on a newly built machine. It already has Windows 10 installed in BIOS Support Mode. I made a LiveUSB and tried to run the ...
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0answers
12 views

“Error building boot sequence. Check parameters” message on Grub Customizer

I'm a new Ubuntu user and I've been trying to boot from an ISO using Grub Customizer. I open Grub Customizer and try to add the Linux-ISO but when I choose the name and the Linux-ISO type, a message ...
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1answer
39 views

New installation: Win10 / Ubuntu Studio 16.04 dual boot and multiple partitions

I'm in my 40's and heard the words Linux for years without ever looking into it. So here I am as green as grass, excited about my new journey. For 2 days straight I've been going around in circles ...
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1answer
29 views

Grub2 keeps saying unknown filesystem-

Hello Friends I'm asking for help.I have a 2006 mac running ubuntu.The problem is it wont boot.So I decided to put an iso of ubuntu on a usb so I can boot it with grub 2.The thing is whenever I try ...
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1answer
17 views

Dual boot Lubuntu install not going well. (on old P4 w/ xp)

Have an unallocated partition, (Youtube vid), Have the 16.04iso on usb. Several different versions all crashed, or just didn't load from the usb. Can't write code, so if it's not fully auto-install, ...
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0answers
15 views

Fix GRUB for Ubuntu Installed on XFS Filesystem After Installing Windows 10

I have a triple boot with Ubuntu 16.04, Ubuntu 15.10, and Windows 10. The 16.04 installation is on an XFS file system. After installing Windows 10 and running boot-repair from an Ubuntu 16.04 live ...
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3answers
9k views

How to get the GRUB using virtualbox?

I have ubuntu-12.04 on my virtualbox and I have two kernels in /boot (old and new). When I restart the vbox no grub appears to choose! and the result of cat /proc/cmdline still shows the old kernel is ...
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0answers
43 views

have: command not found

Whenever I open up my bash and login into a sub-shell I get the following error -bash: have: command not found -bash: have: command not found -bash: have: command not found -bash: have: command not ...
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2answers
46 views

Windows not showing on Grub menu & won't load without USB thumb drive attached

I recently installed windows 7 alongside my Ubuntu installation but am having some trouble getting things to boot properly. There are two issues (probably related).. First thing is that there just ...
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0answers
18 views

Dell Precision Tower 3420 Ubuntu is not booting up

I had my Dell precision workstation with two hard drive pre installed with Ubuntu 14.04. Then I needed SUSE 12 and SUSE 11 instead of Ubuntu so I install SUSE 12 on other hard drive and it was working ...
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0answers
13 views

grub file different

Im really new with Ubuntu. Trying to fix other problems Ive realized that my grub file look like this (below) and not like other examples Ive seen in the web. Is this file ok? I have dualboot of ...
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2answers
28 views

Two instances of grub

I tried installing Ubuntu on my laptop several times and finally succeeded(dual boot) I need to select ubuntu from boot menu in order to open grub and start ubuntu So that is not my problem My actual ...
1
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1answer
50 views

Installation fails on Grub (Read only EFI partition?)

I have a brand new Dell Inspiron 5000 with Windows 10. I've shrunk the windows partition and tried to install an Ubuntu 16.04 LTS to have a dual boot. The installation (sda8 for / and sda9 for /home) ...
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0answers
20 views

Boot Issue with ubuntu 14.04

Hi I am having issue while starting the system everytime I start I have to go to the advanced boot options and start in recovery mode I tried installing the Boot Repair software but the recommended ...
1
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1answer
37 views

Unable to boot into Win10 on dual boot Ubuntu/Win10

When I set windows as first boot option in BIOS it boots into win normally, as same goes for linux. However when I set Ubuntu as first option and try to choose Windows from boot menu it won't boot. I ...
0
votes
1answer
22 views

Installing Windows on Dual boot : Grub issue

I am attemting to install Windows7 64 bit on a secondary NTFS partition, but each time the Windows installer has to restart as it progresses with the install, the installation process starts over from ...
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0answers
9 views

Windows Installation ISO via Grub2 Error?

I have Grub2 installed on a USB drive with multiple boot options and partitions. I have also ran out of primary partitions. My second partition is FAT32 and Grub2 lives there, it is also where also ...
0
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1answer
4k views

Kubuntu UEFI Dual Boot with Windows 7 failed at installing Grub-efi

I want to install Kubuntu 13.04 together with Windows 7 in UEFI Mode. I installed Windows 7 first, which created the EFI boot partition. When it come to installing Kubuntu, the installation failed ...
0
votes
2answers
4k views

Dual boot pc boots directly to ubuntu instead of showing grub menu

I installed windows 8.1 on my new laptop (which came with freedos), I later tried to dual boot the pc with ubuntu 14.04 (with legacy mode). I didn't get an option to install alongside windows 8 so I ...
0
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1answer
19 views

Grub2 doesn't recognize any new partitions?

I am trying to add a new partition to my drive. The drive contains files that grub can boot into (Live ISOs, or Windows Installers). My drive has 250 GB unallocated and has in the past.. Grub2 booted ...
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2answers
3k views

How to solve Grub rescue and/or mounting hard drive problem

So, I have important files in this hard drive, and I need pick up them. To sum up, I had two HD on my machine: one with Ubuntu GNOME 14.04 and another two with Windows 7. I had to connect another HD ...
0
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1answer
39 views

Cannot boot Failed to open \efi\boot\grubx64.efi - not found

So I removed and then reinstalled my power supply a few months back on my home server and for some reason it stopped booting to ubuntu and working like it always has been. I've tried completely ...
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1answer
4k views

Boot-repair: Can't boot ubuntu in uefi mode

I am aware that there are many similar questions in this site, but none of the seems to solve my problem. I've been trying to install ubuntu 14.04 alongside a preinstalled Windows 8.1 in a toshiba ...
1
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0answers
18 views

Stuck at grub rescue prompt after terminating a windows installation

I recently began the installation process of windows 7 on my Ubuntu machine. When I got to the format option on the Windows OS install prompts, I remembered I had some files on my Ubuntu OS that I ...
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0answers
17 views

Grub Boot issue after kali linux install

I am trying to find a solution for a problem My system was working well. I was having two os windows 10 and ubuntu. It was working great till I install kali I need to change the ubuntu grub instead of ...
4
votes
1answer
8k views

What is the difference between GRUB_CMDLINE_LINUX and GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub

I'm troubleshooting a fn-key brightness control problem on my laptop, so I'm wading through a lot of config options in /etc/default/grub, as you can imagine. However, it's raised a question for me: ...
1
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1answer
4k views

Boot .efi files from GRUB2

I've bought a Sony VAIO with UEFI booting and came with Windows 8 preinstalled. I successfully installed Ubuntu 13.10 and Windows 7 (triple-boot) and fixed the UEFI boot so GRUB2 is loading. I was ...
0
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1answer
56 views

How to Start Persistent Ubuntu 16.04 in Macbook?

I am trying to find a way to run my Macbook Air 2013-mid from the external media (usb) containing Persistent Ubuntu 16.06, see here for the creation of the stick: Fixing the EFI partition Update ...