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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Hot to edit /boot/grub/grub.cfg to protect changes on grub

How would I specifically edit that file from preventing people from making changes in grub boot menu. I need it to where it needs a password every time some one tries to make a change to the menu.
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73 views

Windows10 / Ubuntu 15.04 — Grub Rescue

I seem to be having a bit of an issue booting into either of my OS's. I went ahead and upgraded from Windows 8.1 to 10, and upon restarting, something happened with grub. Here's what I've tried to ...
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39 views

Error while installing ubuntu 15.04, unable to install grub-efi-amd64-signed

I tried to install Ubuntu 15.04 in my HP lap which has windows 8 OS. While installing, it showed an error that it was unable to install grub-efi-amd64-signed and it also mentioned that the above ...
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42 views

Help booting ubuntu iso from the hard drive

I am currently using Windows 7. I downloaded the ubuntu's iso file from the official site. I don't currently have a pendrive and my laptop doesn't have any CD/DVD drive either. I found a tutorial ...
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2answers
59 views

How do I install grub for UEFI in legacy mode?

My laptop has no CD-ROM. So I use YUMI to create a bootable USB stick, which seems not support UEFI. I use legacy mode boot from USB and finish install ubuntu(Only one OS). Now I want to switch to ...
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25 views

Grub rescue No such partition and all partition tell me unkown filesystem

I have duel boot Win7 and ubuntu 15 , and I have deleted one partition 2GB and when I have restarted my pc and its tell me No such partition grub rescue, I have tried this step Set prefix=(hd0,msdos ...
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92 views

Windows 10 upgrade, now no partition will boot

I have a multi-boot computer (windows 8, Ubuntu, and elementary OS). Two days ago I tried to upgrade windows 8 to windows 10. When it got done and restarted it went to grub rescue. I tried the whole ...
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21 views

How to prevent people from using 'ro recovery nomodeset' [duplicate]

I really need a way to protect my grub menu from being attack by students who know to go to grub menu press 'e' and then change splash to ro recovery nomodeset. How do I protect that page from ...
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51 views

Would like to install Windows 8.1 (dual boot with 15.04) , but need to shrink encrypted partition first

Disgusted by MS's Windows 10 privacy problems, I decided to give Ubuntu another go. I backed up, formatted the drive, and installed Ubuntu 15.04 only. I love it, it's great, but I do need a Windows ...
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1answer
45 views

how I can rearrange my partitions?

I need help with this problem! I would like to install windows and ubuntu in the same hard disk. My plan was to have Windows on a partition, install ubuntu on another partition, one for ubuntu files ...
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1answer
78 views

Boot folder on external USB pendrive, how to boot to?

My machine is LUKS-encrypted and boot works a charm (asking the passphrase at launch). I want to use a keyfile on a USB pendrive, thus the user has a dongle that the user must plug to launch Linux ...
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1answer
21 views

How to boot into a USB and reinstall Ubuntu on Ubuntu having disk lock?

I had dual booted windows 8.1 and Ubuntu. Later i removed windows 8.1 and installed Ubuntu LTS 14.04 . While installing Ubuntu, i selected to encrypt the disk and used LVM. Now i want to reinstall ...
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2answers
218 views

Grub menu with Windows 10 and Ubuntu 14.04

I have Ubuntu 14.04 and Windows 10 both successfully installed and operational. However, I can not get the grub menu to appear correctly and I've tried using boot repair multiple times. I've done boot ...
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0answers
50 views

Windows 10/Ubuntu 14.04 Dualboot issue

I've tried, I've failed. At this point I have 200GB of free space on my second HDD, I've redownloaded the USB Install. Could someone confirm these steps. 1.) Give 2GB to "swap area" 2.) Give the ...
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0answers
32 views

Uninstallation of Ubuntu [duplicate]

I installed Ubuntu on my system parallely with. The drive in which it was installed, it created a folder named Ubuntu. I completely deleted that folder by mistake and now when the computer boots up, I ...
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2answers
31 views

How to change boot order in grub2 to include bootable USB?

I want to install Windows OS in an empty partition(dual-boot) using a bootable USB. However I can't seem to enter BIOS to change the boot order. Can I include the USB in the boot menu in GRUB2?
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1answer
52 views

Error no boot device found or disk failed ubuntu 14.0

i migrate from window 8.1 to Ubuntu 14.04. I installed Ubuntu create swap area ,boot area and root .and follow all instruction. install g partition and set flag boot area to grub_bios run boot ...
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16 views

Dilemma with Dual boot in HDD and fresh installation in SSD

I'm stuck with a strange situation regarding an existing HDD and an SSD (connected via optical drive Caddy) in my laptop. Context: The HDD already has dual partition with Ubuntu and Windows. I have ...
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26 views

Not able to boot after installing latest kernel Ubuntu 14.04

I am trying to build and install kernel on my Ubuntu machine. I downloaded source code of kernel 4.1.4 and installed it using $sudo make modules_install install I am getting error, Could not mount ...
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0answers
28 views

Wifi not connecting in windows 8.1 in the ubuntu 14.04 and windows 8.1 dual boot system

I am using a dual boot system with ubuntu 14.04LTS and windows 8.1 . I install ubuntu after installing windows. Then the bootloader problem occurs.Windows was not recognized in login. Then I install ...
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0answers
29 views

Installer is not following the preseed file

I am trying to make an unattended install of Ubuntu using a preseed file. My issue is that, the installer is following the same old way even after placing the preseed file and writing entries in ...
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1answer
31 views

Dual Boot cause Ubuntu and Windows to crash

I recently installed Ubuntu on my computer, dual booting with Windows 8.1. Now, I am unable to use either system. When it boots and I select Ubuntu, the login in page flashed and then turns to black ...
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30 views

Where should I install the boot loader on a second drive?

So I recently installed a second hard drive in my laptop. Previously, I had split 1 hard drive into a windows and ubuntu partition, but after running out of space on each, I installed this new hard ...
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3answers
38 views

Will dual boot of Ubuntu 14.04 + Windows XP work for old Acer Aspire 3690?

I want to do a dual boot of Windows XP and Ubuntu 14.04 on a very old Acer Aspire 3690 laptop. Are there any peculiarities of installing Ubuntu with dual boot on Acer Aspire laptops? To be specific, ...
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0answers
169 views

Windows 10 upgrade kills grub

At first, I had Ubuntu 14.04 LTS alongside with Windows 7 Professional. I was on windows 7 and I upgraded to windows 10. During the installation, It had to restart. What happened when I restarted was ...
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26 views

Help with grub errors after installing cloned partition on new laptop

I just installed a cloned ubuntu partition (using clonezilla) on a new laptop that dual boots windows 7. This machine has far fewer disks and partitions than the old one. I installed EasyBCD in ...
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16 views

How do I load Ubuntu from GNU Grub?

I've been trying to find out how to load unbuntu for a few days now, but I am at a point where I have no clue what I am doing... I'm not that savvy when it comes to Linux OS anyway... I've read this: ...
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0answers
16 views

What to do after clonezilla partition install on new machine? refresh grub? fstab? create swap?

Amazingly, somehow, I... a noob.. successfully restored a cloned linux partition from my old laptop into my new one (and didn't lose windows in the process). Then successfully got to grub2 rescue ...
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0answers
29 views

I need help accessing the root shell

Need to reset my admin password on Ubuntu. I've accessed grub, and tried editing the kernel with init=/bin/bash with no luck. Please help. EDIT: When trying to boot as a single user it's never ...
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1answer
32 views

“No media found” bootloader totally messed up

I tried to make a dual boot from ubuntu and windows 10. The thing is, I once tried to do de same thing but with ubuntu and windows 8.1, but things went wrong because of UEFI and I wasn't even able to ...
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2answers
154 views

Can't change brightness of laptop in ubuntu 14.04 / 15.04

When i just try adjusting brightness, the indicator changes but the screen does not change brightness. I have tried adding acpi_backlight=vendor to my grub file and also doing echo x > sudo tee ...
0
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1answer
279 views

unable to boot to windows 10 after installing Ubuntu 14.04.3 LTS

I installed Ubuntu along side windows 10. When I boot, it loads grub page and I can continue to boot Ubuntu. But if I choose windows boot manager on the grub page to load Windows, I get following ...
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1answer
2k views

Windows 10 / Linux Dual Boot - Boot-loader Problems

I am currently running a dual boot of Windows 10 Home 64-bit and Xubuntu 15.04 64-bit on my machine. I have Windows 10 on an SSD, Xubuntu on another SSD and an HDD for storage formatted as NTFS (this ...
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94 views

“Reboot and select proper Boot device…” Help!

I install ubuntu with a USB in my laptop, when the computer restarts from the installation a black displays appear and says "Reboot and select proper Boot Device..." So I investigate everything I ...
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0answers
15 views

Grub always boots to CLI instead of Boot Menu

When booting my PC, grub always boots to the CLI. When I type exit, it shows the regular boot menu and I can boot Ubuntu or choose one of the other options. How do I get rid of grub always loading CLI ...
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1answer
46 views

GRUB version 2.02 doesn't show Windows boot manager after dual boot with Ubuntu 14.04

I had windows 8 , I dual booted windows with ubuntu 14.04 after a while. Now ubuntu is in partition 1 sda1 and you type this command in Terminal sudo fdisk -l WARNING: GPT (GUID Partition ...
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1answer
21 views

WIndows 7 wont load?

I installed ubuntu in a separate partition and my windows 7 was in a separate partition. so in the grub screen when I choose to load from from windows 7 it wont boot and again the grub screen comes ...
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1answer
22 views

I installed Ubuntu on an external UDS HDD. My boot disappeared. Why?

I can't explain why my boot disappeared, after I did it: I plug a pendrive (live Linux Debian) + a virgin HDD-USB, all that on my linux Debian Machine. [usb pendrive live Linux] <=plugged=> My ...
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1answer
52 views

Where is Grub installed on a GPT disk?

Screenshot shows all the partitions I have got and I do not have MBR as far as I know. I had UEFI Windows 10 then I installed LM 17.2 Cinnamon (Ubuntu based) on the top of it. Grub is functioning ...
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2answers
26 views

Grub won't stop loading

I have just installed Windows 10 and dual booted Ubuntu. I made Ubuntu boot first through the bios I just deleted the partitions for Ubuntu I changed the bios settings so Windows 10 will boot first ...
0
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1answer
46 views

how to prevent changes in the grub menu [duplicate]

When you start the machine and press shift to bring up grub menu, and you press e to make changes in the menu that starts off with setparams 'Ubuntu, with Linux 3.16.0-30genric', how do you prevent ...
0
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1answer
55 views

So many entries in Grub

I've just installed Kubuntu 15.04 on the Asus T200TA laptop which came with Windows 8.1 preinstalled. I have the following options available: Ubuntu Advanced options for Ubuntu Windows UEFI ...
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0answers
20 views

Switching Windows Boot Disk via GRUB

I have two drives in my laptop. The first is dual-booting Windows and Ubuntu, and I've been using this one for over a year now (the Ubuntu version is now 15.04). I have just (yesterday) installed a ...
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1answer
66 views

Cant access Windows 7 after dual-booting with Ubuntu

I'm very new to Linux. Recently I tried to dual-boot Ubuntu 14.04.2 LTS with Windows 7. I burned the Ubuntu ISO to a DVD and booted my PC from there. Prior to this, I shrunk my Windows C: Partition ...
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1answer
32 views

how to move grub boot from one partition to another in linux

Is there a way to move the grub to a new partition, or drive in linux in the grub rescue, or the live mode?
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0answers
44 views

update-grub halts

sudo update-grub halts after: Found initrd image: /boot/initrd.img-3.13.0-61-generic I'm trying to expand the resolution of my Xubuntu install on a Windows 10 Hyper-V server. Full output of what ...
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0answers
59 views

Boot repair ubuntu

So I had lots and lots of troubles installing ubuntu, and now it won't boot from windows 7 nor from ubuntu. Even though I partitioned my C:/ drive and put ubuntu on a seperate partition, keeping ...
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0answers
32 views

Unable to see Ubuntu boot option upon startup with Windows 10 already installed

http://paste.ubuntu.com/11999539/ The above link was generated upon running boot repair. It says: Boot successfully repaired. You can now reboot your computer. However, upon rebooting, the option ...
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0answers
32 views

grub rescue error on ubuntu 12.04 32bit

When I tried to boot up Ubuntu 12.04 32bit, it showed the "grub rescue" screen. I want to make Ubuntu work again without loosing data. Please help me out on this! Thank you in advance...
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14 views

Every other boot drive decryption doesn't work

This isn't a 50% chance of happening thing, here's a common sequence of events: Boot into grub, where I select Ubuntu Blank purple screen, type in decryption password and hope it works It does, can ...