GRUB2 is the second revision of the GRand Unified Bootloader, with versions numbered 1.9x and 2.yz.

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Error booting kernel 4.5.0-rc1 on Encrypted HDD

I cloned the Git tree of the mainline Linux Kernel and compiled it(version 4.5.0-rc1). After compiling with default configuration (make defconfig) I installed it. In the grub menu I can select this ...
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GRUB2: adding insmod xxxx module in the grub.cfg properly

I want to add my own custom grub2 module, for ex. xxxx.mod into the grub.cfg. How can I do that? For example, here i want to add insmod xxxx.mod below: ### BEGIN /etc/grub.d/10_linux ### menuentry ...
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45 views

Manually move kernel image to /boot directory

I have compiled my own kernel on Gentoo (following the handbook) and then I have moved the bzImage to /boot/vmlinuz-4.0.5. But when I boot the system I get the Grub2 shell. What am I doing wrong? ...
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Arch Linux grub installation error “airootfs”

I was following the official installation tutorial. Everything was smooth until the boot loader section. I had encountered the error of /usr/bin/grub-probe: error: failed to get canonical path of ...
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335 views

What is the purpose of the grub command line

In the grub bootloader if you press esc it will take you to a command line interface that looks like grub> _ What is this promt used for? It doesn't look like it's connected to Linux. Is it a ...
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grub2-install: error: cannot open /boot/grub/i386-pc/usbserial_common.mod: No space left on device

I am at the final step in a Gentoo installation, and I have some problems installing grub2. I did an emerge --ask sys-boot/grub and everything went ok. After this I ran (chroot) livecd # grub2-install ...
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Is there a way to edit the title of GNU GRUB2 itself (not a title of a menu entry)?

I'm interested in knowing if there's a way to edit the GRUB2 boot menu to display a banner at the top. We have several machines that boot from SAN. I'm doing migrations and our SAN team ...
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8 views

Get correct Windows partition back in Grub

Model: HP Compaq Mini 32 bit. Device: Samsung Evo SSD 120 GB. OS: Dual boot --> Linux Mint 17.1 Xfce & Windows 7 Starter. TLDR: Fixed Grub + got Mint back using parted rescue; win7 reboots or ...
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11 views

Grub unknown filesystem [duplicate]

I accidentally deleted my Linux partition and the next error message appears when I boot: error unknown filesystem grub rescue. I can't even boot Windows from CD or Linux from usb.
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1answer
20 views

Why shouldn't we edit grub.cfg for grub2

If you cat /boot/grub2/grub.cfg, you get the big block of text telling you DO NOT MANUALLY EDIT THIS FILE, indicating that you should instead edit files in /etc/default/ instead and then run ...
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15 views

CentOS 7 grub option is missing after upgrading windows 8 to 10

My system was dual booted with CentOS 7 and Windows 8. After I reinstalled the latest Windows 10 Pro and removed windows 8, my system is only booting with Windows 10 as the Grub2 is not appearing at ...
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how to resume GRUB2 upgrade apparently blocked by /boot filesystem type=ext2?

details As detailed here, the /boot on this Debian Jessie had filesystem type=ext2 $ mount | grep -e '^/dev/' /dev/sda3 on /boot type ext2 ... ... and was unable to upgrade its GRUB2 $ sudo ...
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If i install Elementary OS, will it automatically be added to the Grub menu?

I currently have Windows 7 and Linux Mint installed. When my pc starts up, it shows me the Grub menu, it shows an entry for Mint linux and the windows boot menu. I am wondering, if i was to install ...
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1answer
33 views

If i install Elementary OS, will it automatically be added to the grub menu? [duplicate]

I currently have Windows 7 and Linux Mint installed. When my pc starts up, it shows me the Grub menu, it shows an entry for Mint linux and the windows boot menu. I am wondering, if i was to install ...
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17 views

Debian Jessie grub-install broken in some mysterious way

I did an apt-get dist-upgrade today (2016/02/01), and now my system won't boot. The only reason I can get in at all is that there's a copy of Ubuntu installed as well, and I can boot it from the ...
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16 views

How to set persistent low brightness in grub2 menu?

I have a Samsung laptop with ivy bridge Intel processor and Intel HD graphics. The brightness is controlled by /sys/class/backlight/intel_backlight/brightness which accepts values from 0 to 4882. The ...
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1answer
22 views

No entries for Ubuntu after executing update-grub on CentOS

My server is running Ubuntu 12.04 LTS from /dev/sda3 (ext4). I experimented with CentOS 7 some time ago and that is on /dev/sda2 (xfs) and its grub is used for booting. It showed only the latest ...
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30 views

Can I make grub go back to the menu when I get the cryptomount passphrase wrong?

I have GRUB 2 (EFI) booting my system, which is dual-boot between Debian 8.2 and Windows 10. The Debian system is on an encrypted partition, which is unlocked using cryptomount. This all works fine ...
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1answer
24 views

Screen going to sleep and then not coming back on

Recently set up a dual boot with windows 10 and linux mint 17.3 with windows 10 on an ssd and linux mint on a internal hdd. I have an ATI 7950 Raedon video card connected via miniDP to a Dell U2715H. ...
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22 views

Minimal BASH like line editing is supported

I have Fedora 23 dual boot with Windows 10. Suddenly, I'm not able to see the normal GRUB menu to go into either Fedora or Windows. I've seen the question and answer here but I'm already stuck at ...
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1answer
47 views

Grub seems to don't load its config from grub.cfg

I have a computer with 3 OS installed on it : Blinux Blinux exam Windows 7 (Blinux is a custom version of OpenSuse that we use in my school). I have recently restored my computer with the image ...
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1answer
33 views

Repair Bad Ubuntu Installation With Grub Rescue & No Changes to BIOS

I have a old Dell PP01X laptop (it has a floppy disk reader & an external wifi card) which I tried to install Ubuntu on. To do this, I partitioned the drive into 3 parts (windows, linux, and swap ...
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24 views

Keyboard doesn't work GRUB after boot on Windows

I have a Razer keyboard and a dual boot (Arch Linux + Windows 7). The keyboard works fine if I just use Arch Linux. Whenever I boot on Windows my next time on GRUB the keyboard won't work anymore. ...
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1answer
36 views

ElementaryOS not recognized by Grub2

(The hyperlinks are pictures I took) I had Windows10 installed in my computer (which is a Lenovo Z70) and I installed ElementaryOS but Grub2 is not recognizing the OS, actually none of them. If I ...
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18 views

How can I speedup the time from boot to GRUB screen?

I have Windows 8.1 Dual booted with Arch Linux. I find it takes atleast 10 seconds from pressing the power button to showing the grub screen menu selection. I find that really strange since I ...
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34 views

GNU grub version 2.02

I have double boot running windows 8 and mint. Today when i started pc , it did not asked me which system i wanna boot but instead throw GNU GRUB Version 2.02~ beta 2-9 Minimal BASH-like line ...
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24 views

Verify integrity of EFI file before chainloading

Can I, in GRUB, configure it to verify if the EFI file it is going to chainload being signed (using the Secure Boot database) and refuse to boot if not signed? I had to disable secure boot for GRUB to ...
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39 views

How 'Reversible' Is the BURG Bootloader?

Before messing things up and running to ask for help, I thought to check in advance: I want to experiment with the BURG bootloader, as it seems so much better aesthetically than GRUB. I wanted to ...
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1answer
37 views

Windows won't boot from hd1

I've added a second Disk to my system and copied my linux-installation + grub on it. My system contains 2 disks now: hd0: sda5: linux hd1: (old system with dualboot) sdb2: windows sdb5: linux If ...
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1answer
78 views

Minimal BASH like line editing is supported. Boot error on Fedora

I am using fedora 22 and windows 8 on my laptop. Recently I updated fedora using yum update command. When I restarted fedora, boot menu is not coming. Instead a black screen is coming with following ...
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29 views

Combine grub2 + GPT partition + LUKS + LVM (grub overwrites LUKS header)

I'm trying to configure system to boot from one GPT encrypted LVM partition. But when I set partition type to 8300 grub-install complains on warning : this GPT partition label contains no BIOS boot ...
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25 views

“Filename must be either an absolute pathname or blocklist” Error during boot

I'm using a FS laptop where Lubuntu, Xubuntu, and Puppy Linux are already installed. I'm using a GRUB boot loader which works as expected with the above. I thought to give Debian a try, so I ...
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1answer
67 views

Looking for the right way to rename the GRUB boot entries

I am taking about the naming of existing/default GRUB boot entry. Currently I've the following options at GRUB screen: Trisquel GNU/Linux Advanced options for Trisquel GNU/Linux Trisquel GNU/Linux, ...
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12 views

How to speed up scrolling of text during boot?

I've got a desktop PC running Arch Linux and GRUB2. After changing the graphics card (from an older AMD Radeon HD to a newer Nvidia GeForce GTX 980 Ti) the scrolling of the boot messages (that is, ...
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How to quit GRUB2 pager early?

Somehow the GRUB2 pager scrolls only about one line per 2 seconds, so it takes absolutely forever to boot after enabling the pager and debug messages. Is there any way to quit this pager when it's at ...
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36 views

grub2-mkconfig doesn't show Windows

After recently having installed Fedora on the same HDD as Windows, Boot manager no longer shows up in Grub2. When trying to repair what I've done by running grub2-mkconfig, it doesn't find Windows. ...
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62 views

GRUB2: boot to a second (another) hard disk

I have researched for this question, but have not been able to find a clear answer... or even a clear question. So I will use a simple example. My computer have **two hard disks: ** Hard Disk 1: ...
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Issue when trying to boot Windows partition (Linux Mint/Windows 10 Dual Boot)

I recently partitioned my hard drive with about 22 GB of space for Linux Mint and the rest for Windows 10. From the GNU GRUB menu, I'm able to properly boot into Linux Mint by selecting the menu ...
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48 views

All of the sudden, grub brings me to it's minimal command interface, and doesn't boot my OS

My homeserver started doing weird things. First it was super slow, then it didn't even connect to the internet. I connected a display, and found out it was getting stuck at grub. No rescueprompt, just ...
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112 views

Kernel panic after Gentoo install — cannot open root device

I have a Debian system on /dev/sda1 (/) and /dev/sda2 (extended, /dev/sda5 is /home, /dev/sda6 is swap). I want to install Gentoo in parallel, so I shrinked sda2 and created /dev/sda3, in which I ...
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1answer
40 views

How does grub2 find its configuration file in EFI boot?

There are bazillions of grub2/EFI threads on the net, but I found it difficult to find an answer to the question above. We have been told that in grub2 the configuration file is /boot/grub/grub.cfg. ...
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3answers
50 views

changing grub boot drive

I just installed a new SSD and I want to move all the files from the HDD to my SSD. I cloned the partitions from the hdd to the ssd. I run on a dual boot - windows 10 and ubuntu 15.10. So, now I have ...
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742 views

arch linux- error:failed to get canonical path of 'airootfs' (grub to USB installation)

I'm trying to install arch-linux for the first time. everything was OK till I tried to install "grub" boot-loader to a USB drive. I am working by the WIKI ARCH LINUX guide. both of this commands ...
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40 views

Linux Mint and android x86 grub repair

I installed on my laptop an .iso of android. I have partitioned it the way that Linux Mint would stay on sda1 and Android on sda3, but now I don't see anymore the option to boot Linux Mint on the grub ...
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38 views

System fails to boot after Linux installation

I have installed kali linux. But when I try to boot I receive the following message as shown in the figure: May be because of wrong GRUB configuration. How can it be fixed?
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How would pressing backspace 28 times break Grub2 [duplicate]

I just came across this article about how pressing backspace 28 times on the grub screen. Since most mainstream media just says this happens, I've been unable to find anything that explains how it ...
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63 views

Adding Windows 10 Boot-record to Syslinux [Dual-Boot]

I replaced my old Debian-based OS (which dual-booted alongside Win10) with Arch, and replaced the GRUB Bootloader with Syslinux. So now, I have: Running Arch Linux x86_64 SysLinux with Arch Linux as ...
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2answers
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My computer is booting to a full purple screen and asking for a username and password

Yesterday I reboot my computer to find out something went wrong the computer does not boot after about 10-15 sec after I press the power button it goes to a full purple screen I can't do anything to ...
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GRUB2 security vulnerability: pressing backspace 28 times: What are my risks? What should I do? [closed]

There have been reports yesterday about a new security vulnerablity: Lucian Constantin (2015-12-16). Vulnerability in popular bootloader puts locked-down Linux computers at risk. CSO Online. ...
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1answer
64 views

Difference between sd0/sda, hd0/hda

From what I understand, hdx is naming convention for IDE (PATA) drive, sdx is for SCSI (SATA) drive. Sometimes I see sd0 and sda, similary hd0/hda. What are their differences ? When would we use ...