Questions tagged [grub]

This tag is ambiguous: use grub2 or grub-legacy as appropriate.

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votes
3answers
7k views

Grub not loading after Windows 8 Install

My system was configured to dual boot Ubuntu 12.04.1 LTS and Windows 7. Today I got my hands on the MSDN release of Windows 8 and I installed it over my Windows 7. Now the computer just boots to ...
33
votes
2answers
264k views

Boot windows from grub rescue command prompt

Previously I had installed the Ubuntu 10.04 and Windows 7. Now I logged on to Windows, opened the partition editor and deleted the volume containing the Ubuntu - I thought it will delete the Ubuntu ...
41
votes
7answers
123k views

Equivalent of update-grub for RHEL/Fedora/CentOS systems?

In Ubuntu (and I guess in Debian too) there is a system script named update-grub which automatically executes grub-mkconfig -o with the correct path for the grub configuration file. Is there any ...
9
votes
5answers
11k views

How does Grub Stage1, exactly, access/load stage 2?

This is my first ever question, I have put this question in front of Red Hat Instructors but didn't find any satisfying answers. I'm using RHEL/CENTOS6, GRUB Legacy 0.97, and have consulted heaps of ...
4
votes
6answers
29k views

Kali Linux is Installed but not showing in boot manager

I recently bought a new Laptop: Lenovo IdeaPad 320e Intel i5 7200 2.5GHz processor 8Gb RAM 2Gb NVidia 940mx Graphics 1TB HDD It came with freeDOS so i installed Windows 10 on it on EFI mode. A few ...
2
votes
1answer
24k views

How to add Windows to GRUB

I have my encrypted Archlinux installed on my SSD. Now I have one HDD with Windows installed. But in my GRUB just Archlinux is shown (no Wonder, because I just installed Windows on the other HDD, GRUB ...
60
votes
7answers
163k views

Set default kernel in GRUB

How can I pick which kernel GRUB2 should load by default? I recently installed a the linux realtime kernel and now it loads by default. I'd like to load the regular one by default. So far I only ...
8
votes
2answers
67k views

grub-install : command not found

I had Windows 8.1 and Kali Linux installed in an extended partition. For some reason, I only formatted the partition where Windows was installed and re-installed. Now it only boot into Windows and ...
3
votes
5answers
9k views

I deleted files from my Linux box's /boot directory and now it won't boot [duplicate]

I deleted files from /boot to save space, but now when I boot I see: GRUB loading, please wait ... ERROR 15 /boot still has files corresponding to the 2.6.32-27 version of Linux. But I deleted all ...
1
vote
2answers
1k views

restore suse grub

I upgraded my ubuntu and that resulted in its grub loader being used. I have a triboot of windows, ubuntu and suse. I prefer the suse bootloader which I was using before the ubuntu updates. I would ...
0
votes
1answer
2k views

How to update /boot/grub/menu.lst?

How can I set the ex.: "intel_idle.max_cstate=0" in the boot kernel parameter? So just want to update /boot/grub/menu.lst, how to do it permanently on SLES 11? Without using yast. Or just ...
7
votes
1answer
5k views

after BIOS splash, will not boot, asked to select OS, but can't

I'm running Linux Mint 13 MATE 64-bit. Everything has been working for several weeks. Yesterday, when I tried to boot up my computer, after the BIOS screen flashes I reach a screen with a black ...
2
votes
2answers
11k views

Archlinux failed to boot: can't access tty: job control turned off

I came across the problem after upgrading my system through pacman -Syu. During the upgrade, I encountered a python package conflict which caused the upgrade transaction aborted. So I resolved the ...
1
vote
1answer
2k views

Garbled text on startup

I'm having an issue with my Ubuntu Server 16.04 installation. I have it running on a Zotac Z-Box CI23 Nano. It installed fine, but on its first boot all I had was a blank screen. I edited /etc/default/...
26
votes
3answers
48k views

How to switch arch linux to lts kernel?

I'm running a headless server installation of arch linux. The high rate of kernel upgrades caused me some maintainance headache and I therefore wish to switch to the lts kernel. I already installed ...
14
votes
2answers
103k views

Cannot find EFI directory: issue with grub-install

I was trying to rescue GRUB in Linux. I was able to login in the OS following this tutorial: https://www.lisenet.com/2014/grub2-rescue-mode-error-unknown-filesystem/ I have to upgrade GRUB to fix ...
21
votes
5answers
21k views

How to stop update-grub from scanning all drives?

Every time update-grub is run all hard drives are scanned. Each drives that is in standby state will spin up to go idle. This is a waste of energy. We use update-grub version 1.98: # update-grub -v ...
31
votes
2answers
45k views

A new version of configuration file /etc/default/grub is available, but the version installed currently has been locally modified

I am using 3.2.0-4-amd64 #1 SMP Debian 3.2.46-1 x86_64 GNU/Linux Debian GNU/Linux 7.1 (wheezy) Release: 7.1. I typed "sudo apt-get upgrade" and hoped for the best (I updated all my packages just ...
23
votes
2answers
39k views

What do the kernel parameters acpi_osi=linux and acpi_backlight=vendor do?

I had troubles with the screen brightness control in my laptop and I fixed it by adding the acpi_osi=linux and acpi_backlight=vendorparameters to the filegrub.cfg. I'd like to know what these ...
18
votes
5answers
78k views

How do I change the GRUB boot configuration from within Windows?

I currently dual boot Windows 7 and Fedora 14, using GRUB, with Windows 7 as my default. I know that from Fedora, I can set GRUB to boot into Fedora, overriding the default, on the next reboot. Is ...
11
votes
3answers
17k views

How does Linux deal with a separate /boot partition?

I am interested to learn about how Linux deals with a separate boot partitions. I am not interested in actually doing this, but I would like to know how this works under-the-hood. Consider a hard ...
16
votes
1answer
17k views

GRUB Quiet Splash

As a Linux newbee, I would like to know What exactly is the significance of "Quiet Splash" in GRUB? GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
11
votes
2answers
17k views

Rotate console on startup (Debian)

I want to rotate my console (not X Server) by 90 degrees (clockwise). The following seems to work for me: echo 1 > /sys/class/graphics/fbcon/rotate; however, I'd prefer to use a kernel option in ...
7
votes
3answers
51k views

Laptop boots directly to Ubuntu, can't access BIOS or Boot menu anymore

I'm running Laptop with single OS: UbuntuMATE 15.04 Beta1 64bit on Toshiba laptop Core i3. After burning "Elementary OS" on a live USB drive using UNetbootin, what happened is: -After reboot, laptop ...
2
votes
1answer
3k views

How to reset Linux root and grub passwords?

If we forget our Linux root password, we can change it by changing grub's boot options. But in this case, we also set a grub password and forgot both passwords. How can we recover both?
20
votes
10answers
126k views

How to start a windows partition from the Grub command line

I have Windows 10 HOME installed on my system. After I installed Windows 10 HOME, I installed Ubuntu 14.04 LTS on a separate partition so that I could dual boot. I removed Ubuntu 14.04 LTS by ...
6
votes
1answer
3k views

How to make GRUB resume from hibernate in a dual boot PC

I have a laptop running two different GNU/Linux-based operating systems. Each operating system has it's dedicated root and home partition, but share the boot and swap partition. They both work quite ...
5
votes
1answer
2k views

Grub and usb serial support

How to access the grub menu using a usb serial converter? I know it's possible to have grub menu in serial console, putting these lines in grub.conf: serial --unit=0 --speed=9600 --word=8 --parity=...
3
votes
6answers
7k views

Syntax error in grub.cfg on update-grub (Grub 2) (memtest86+)

When I run update-grub or I try to reinstall it, I get a "syntax error". The output is somewhat like this: error: syntax error. error: Incorrect command. error: syntax error. error: line no: 262 ...
8
votes
3answers
18k views

arch Linux boots into grub command line

I'm trying to install Arch Linux over virtual box guest machine in a UEFI mode. I've followed beginner's guide to install base system, generate fstab and etc and my system now boots into grub command ...
6
votes
2answers
12k views

Is it possible to add some 'PXE Network Boot' option to GRUB?

This is an example of my available GRUB menu boot options: 1 menu label ^ 1) Xubuntu 14.04.02 LTS 2 menu label ^ 2) Windows 7, x86 & AMD64 3 menu label ^ 3) Windows 8, ...
5
votes
0answers
2k views

Can't see GRUB menu on boot [closed]

I've installed Ubuntu 15.04 on a Google Pixel 2015 Chromebook, but I can't see the Grub menu. At the time when I should be seeing it, all I see is "Booting from hard disk" and there's some distortion ...
2
votes
2answers
8k views

Installing GRUB in a dual-boot

I've just installed my OSes on a new HDD: Windows 7 and Debian 7. As usual I first installed Windows, then Debian. At the first attempt, GRUB seems to not have been installed properly, because my ...
7
votes
5answers
23k views

not syncing vfs unable to mount root fs on unknown-block(0 0)

I had a windows10 and Manjaro on my laptop and everything was Ok. last day I've installed Kali Linux in another partition. It has installed correctly and it works fine. But the problem is when I want ...
6
votes
2answers
8k views

32bit EFI with 64 bit linux OS. Can it be done?

I have a 32bit ubuntu linux install on an hp stream 7 tablet. For the sake of long term support I would like to install 64bit ubuntu linux on this device. The tablet has a 64 bit intel baytrail ...
6
votes
2answers
5k views

Grub fails to install - Debian Wheezy with mdadm RAID1 and GPT partition table

I've been trying all day to get my new Wheezy install completed but it fail to install Grub every time. I'm using x64 netinstall iso. Here is my partition table: Model: ATA ST3000DM001-1CH1 (scsi) ...
5
votes
7answers
52k views

How to Reset Forgotten Root Password in Fedora 19 from GRUB

YES, FEDORA 19. I saw a lot of information about how to do it but doesn't work with this version. All the tutorials explain the method for older versions of Fedora, i didn't found anything about ...
4
votes
2answers
2k views

Screen corrupted after booting debian 8.5 installer

Problem: I'm trying to install Debian 8.5 Linux (amd64 netinstall from USB) on a Fujitsu Lifebook P701, but after I select "Install" (or "Graphical Install", or anything else) from grub, I get ...
4
votes
1answer
15k views

grub-install: error: cannot find efi directory

I recently dual-boot kali-linux-2016.2-amd64 with windows 10. After sometime I updated my windows 10 and due to this windows might have removed grub from the boot menu. Now I can't boot kali-linux ...
3
votes
2answers
6k views

Set initramfs to prompt for luks passowrd on startup on Mint 18?

After updating to Mint 18.1, I can't get initramfs to prompt for a password to unlock the volume with the root file system on it. I have to wait until initramfs times out to a prompt then run ...
3
votes
2answers
2k views

How to move the bootloader from a hard drive to a usb stick

I've decided to move my Debian bootloader and /boot from the hard drive to a USB stick. I'm using LUKS to en/decrypt my hard drive and the bootloader is the only unencrypted partition. How can I ...
2
votes
2answers
540 views

Switched distros; Broke grub

My HDD uses GPT. I've set my boot mode to UEFI only. My partitions are: /dev/sda /dev/sda1 Grub 300MiB FAT32 /dev/sda2 Linux 97.66GiB ext4 /dev/sda3 Windows 97.66GiB NTFS /dev/sda4 ...
2
votes
1answer
2k views

Boot into chroot directory leaves the root partition read-only

I am trying to make grub boot into a chroot directory /slack containing a Slackware Linux installation. This directory was created by issuing the following command: installpkg --root /slack a/*.t?z ...
1
vote
1answer
7k views

Add Prime OS (Android_x86_x64) to grub menu

I have debian dual boot with windows and try to install prime os also, while install it i didn't install it's grub because i have debian grub, but after installation i can't found it in grub . ...
1
vote
4answers
1k views

How to install Fedora&Ubuntu with encrypted VG's on one disk?

I installed Fedora 14 first, then Ubuntu 10.04. I installed them using dm_crypt/aes256/lvm, so I used encrypted VolumeGroups. At the end of the Ubuntu install it said it cannot install GRUB, so I had ...
1
vote
0answers
1k views

grub rescue (all partitions) : unknown filesystem

I am stuck with grub rescue. I have a dual-boot with a Windows 10 and Ubuntu 14.04. Now when I try to boot my laptop, it enters grub rescue mode. I tried ls commond: grub rescue > ls The ...
0
votes
1answer
4k views

Want Windows to boot instead of Grub

So when I turn my computer on, Grub rescue boots up. I have finally figured out how to get into Windows, but now I want to skip the step of entering the information into Grub to get into windows. How ...
7
votes
2answers
6k views

Grub2 without arrow keys

My laptop keyboard recently had a losing encounter with a beer, and the arrow keys don't work anymore. No big deal, I figured -- I remapped CAPS+hjkl to the arrows in xkb, and after a little getting ...
5
votes
2answers
3k views

grub error : “File not found” for separate /boot/efi partition

I've installed CentOS 6.4 on UEFI enabled machine, created /boot/efi partitions. But my grub is not automatically starting, if I start the PC, I start in Windows 8. I can only start CentOS by ...
4
votes
1answer
1k views

Debian Jessie hanging on boot

After installing kernel 4.6, we booted a development server with Debian 8.5 Jessie. It does not go past the error message "Setting up LVM Volume Groups". The VM has Debian 8, with backports ...