Bootloader issues: what happens before the operating system itself starts.

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2
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1answer
198 views

How to apply grub theme to a live usb?

This is my setup, I Have installed grub on the usb using grub-install command in the /boot directory. I copied 3 iso's on the usb Manually created a grub.cfg file to boot into the iso's. So I want ...
2
votes
0answers
313 views

How do I add modules, binaries or scripts to initramfs in RHEL distributions?

I have an initramfs script I developed for Debian distributions that required some extra binaries to be loaded into the image. I'm now trying to port this to RHEL distributions and I'm struggling. To ...
0
votes
1answer
86 views

system rescue cd failure reading sector from cd0

Im trying to run system rescue cd on my HP4250 laptop and im getting a read error on the disk. Its saying the kernel needs to be loaded first, oddly enough, even though this is the place where i ...
0
votes
0answers
310 views

how to compile/decompile a stock Preloader.bin & LK.bin of android

an image file is attached to make my query precise. Is there a way I can decompile my stock preloader or lk.bin so I can make it enter in recovery mode w/out enabling it via adb reboot recovery?
0
votes
0answers
308 views

USB live Kali linux with macbook pro

I made a live USB with Mac Linux USB Loader, but when I try to boot Kali Linux on my Mac, it's showing this: Loading Linux kernel...error: file `/live/vmlinu' not found. done Loading initial RAM ...
0
votes
5answers
2k views

USB flash drive does not appear in Samsung NP900X4D UEFI “Boot Menu”

I have a Samsung NP900X4D laptop and I would like to replace the existing Windows 8 installation with a Debian 8. At first, I copied Debian 8 hybrid iso image to a USB flash drive with cat debian-8....
1
vote
1answer
67 views

How to add entry for bootable external drive partition to internal bootloader?

I created a bootable partion on a Toshiba Canvio 2 for LinuxMint, leaving one other partition of same size for possibly another install in the future and the rest of the drive is for storage and back ...
1
vote
1answer
1k views

Freshly installed elementary OS Freya missing on boot menu [closed]

In my laptop right now I have two operating systems: Windows 8 and Ubuntu. I also had a third one I installed in the past but never used it: elementary OS Luna. I saw elementary OS finally released a ...
0
votes
1answer
37 views

install grub but no booting

I'm having trouble installing grub. I used to have a UEFI boot setup but it constantly failed so I decided to use normal boot instead. Unfortunately, the system doesnt boot into grub. What I did was:...
1
vote
0answers
25 views

How to chainload from usermode?

Starting from user mode runlevel in linux, is it possible to boot another OS on the system without ever passing through BIOS or GRUB/similar and never turning off?
0
votes
0answers
1k views

Kali Linux not appearing in grub after installation

Today I installed Kali Linux via bootable USB, and during installation there was a problem installing the bootloader. So I skipped its installation and restarted my computer. But GRUB couldn't find ...
6
votes
3answers
676 views

How to skip DHCP if no cable connected to ethernet in Debian

My Bananian Linux is wasting time at logon trying to get a DHCP lease for eth0 interface which is not connected. Well, the extender cable is connected to it, but nothing is on the other end. I have ...
1
vote
1answer
390 views

Force screen output to external monitor while installing/booting linux

I'm currently using a laptop with a missing screen, so I've connected an external monitor which, for the most part, has worked quite well. Problems arise, however, if I have multiple Linux distros ...
1
vote
0answers
482 views

Manjaro Laptop suddenly won't boot Xfce desktop environment. How to boot up normally?

My Manjaro Linux laptop suddenly won’t boot up my Xfce desktop environment. When I start the computer, the PC: boots pass GRUB, then quickly flashes this message: [0.029878] Ignoring BGRT: invalid ...
0
votes
1answer
501 views

Samba: Only works after manual restart

I have a small Samba just for file sharing on a ARM device (SheevaPlug). Until now everything was fine, however I decided to upgrade to Debian 8.1 and by some reason the shares aren't working properly....
0
votes
0answers
443 views

Manjaro Linux Laptop won't boot xfce. How to boot up desktop enviroment?

I have no idea why my manjaro linux laptop won’t boot up. It was working fine earlier today. When I start the computer, it boots up to the password log in screen for cryptManjaro volume, because ...
1
vote
0answers
1k views

FIPS integrity test failed

I recently enabled the fips module in my CentOS 6 machine using this guide. During reboot, the system halted with this error: SELF TEST FAILED (/usr/lib64/hmaccalc/sha512hmac.hmac) dracut: FATAL: ...
1
vote
0answers
16 views

Unable to set luminosty with a usb boot

When I boot from a live USB I can't adjust luminosity. I need to plug a VGA screen to my laptop in order to be able to see the screen. I managed to fix that when I installed Ubuntu with the ...
0
votes
0answers
104 views

Backbox install only shows grey screen

I am installing BackBox-4.3-amd64 (ISO downloaded from website) onto a HP G60-630US laptop (64bit) via USB and I get a grey screen instead of the option to install or run live. It says Backbox will ...
1
vote
0answers
185 views

Where do these boot log entries come from and who creates them?

I'm wondering what kind of code writes these first two lines into /var/log/syslog while booting my machine: Aug 4 10:13:48 HOSTNAME kernel: imklog 5.8.11, log source = /proc/kmsg started. Aug 4 10:...
1
vote
1answer
148 views

How to edit Debian installer boot paramaters?

I need to edit the boot parameters of the Debian installer to add priority=critical to the arguments. (this is for preseeding). What should I do to apply these parameters to the installer?
0
votes
0answers
40 views

Unable to boot Linux Mint due to Wi-Fi adapter

I have a Lenovo Flex 2 14D notebook with AMD A8 processor and factory installed Win 8.1 OS. Recently I dual-booted it with Linux Mint 17.1 Cinnamon. However the boot fails all the time. I ...
1
vote
0answers
88 views

Installing a bootloader on a mac

Due to a somewhat odd requirement for a particular linux installation, with a particular software suite, I found it best to use ddrescue to populate the harddrive with the partitions and their data. ...
1
vote
2answers
308 views

Disable laptop keyboard to only use USB keyboard

I need to disable my laptop's keyboard so that keyboard can only be used via USB. I am not using X, I am on the Linux console. The solution should be able to start as early in the boot process as ...
1
vote
1answer
291 views

Grub reboots PC after showing only “Grub loading.”

I have this old computer I use for the more experimental OSes, and about a month ago I installed Gentoo on it, with GRUB2 as boot loader. Everything worked fine, but every boot it would show an error ...
3
votes
2answers
184 views

How to defend against a Live USB computer hack

A Linux installation can be simply hacked by using a live USB/CD, gaining root access on the live distro, chrooting to the target filesystem and running passwd root. One can use grub too. There may be ...
3
votes
1answer
61 views

is it possible to run ubuntu kernel on fedora root filesystem?

My concern is theoretical possibility of running ubuntu kernel with fedora root filesystem (e.g. 3.2.58 ubuntu kernel on fedora 22). It's long story why I need this.. Also, I have no chance to make ...
0
votes
0answers
136 views

Arch Linux Boot Halts on “Started Authorization Manager.”

I was using Arch Linux on my laptop, and during the shutdown procedures there was something making it wait and during that time my laptop ran out of batteries. Now when I try to boot it halts. This ...
0
votes
2answers
2k views

Uboot passes arguments to kernel!

How can uboot pass command line argument to kernel? I did some googling and got to know that it uses the bootargs environment variable. There it was mentioned that setenv bootargs key=value. Since I ...
4
votes
1answer
372 views

how to completely blank video output on boot (no kernel logging, grub output, etc.)

So, this is an inversion of the classic question: "Why is my terminal blank on boot?" -- How do I make my terminal blank on boot? I'm creating a Debian Wheezy system with GRUB as the boot loader that ...
0
votes
0answers
263 views

grub2: error: /vmlinuz-3.16-ucs109-amd64.efi.signed has invalid signature

I am using a derivative of Debian, called Univention Corporate Server. It's a nice appliance that I use for my home server. Yesterday I upgraded to the newest version and since then my server does not ...
1
vote
1answer
165 views

Boot to different partition after restore of operating system

Let's say I have a server with one RAID with 3 partitions: P1 - 20G OS / programs P2 - 190G Data P3 - 20G unused If I ever need to roll back P1 to a previous state, and I've restored a past ...
3
votes
0answers
77 views

How to get the values for “set root” in menuentry while setting password for GRUB2 on CentOS 7

I need to disable single user mode on my servers running CentOS 7. I read the RedHat documentation on what goes to /etc/grub.d/40_custom and how to encrypt the password and all but one details makes ...
3
votes
0answers
134 views

How do I bypass entering exit manually at the initramfs prompt?

I installed lubuntu onto my desktop PC and it does not have any other OS on it. Everytime the system boots up, I get to the initramfs prompt. It does not show any errors. If I enter exit, the system ...
0
votes
0answers
277 views

Failed to start user service: unknown unit: user@0.service after grub launch

First I have to let you know that I got absolutely no knowledge about linux and need help and explaination like Im 3. So, Im on holidays and I have no live cd with me. I tried to install crome and ...
0
votes
1answer
158 views

Why my manufacturer splash screen is not showing?

I recently installed Fedora 22 on a dual-boot with Windows 8 on the other. But, since I installed it, I have had the following problem: When I press my power button to switch it on, the screen just ...
1
vote
0answers
96 views

Live USB - Tails tries to boot but ends up booting into Kali Linux

I have a bootable USB drive with Tails and Kali Linux on it, among others. Kali boots fine. However when I try to load Tails, it manages to get past the Tails loading screen but then the Kali logo ...
0
votes
1answer
147 views

Boot Debian netinst CD to RAM?

Is it possible to boot an install CD to RAM? I want to boot the CD and eject it before I proceed with the setup. And when not, where do the changes have to be made, to get a "toram" boot option?
2
votes
1answer
333 views

Grub 2 multi image boot disk boots some images but restarts on others

The issue I'm having is that my bootable usb I have only works with certain boot images, to be more specific it will boot Ubuntu desktop iso images but not Ubuntu server. If I try to boot Ubuntu ...
0
votes
1answer
43 views

how do I make a grub boot disk with multiple boot images

How do I use commands (I'm doing everything on Ubuntu) to create a bootable usb that displays a grub menu automatically when booted from, on that grub menu lists some boot images (downloaded from http:...
0
votes
1answer
187 views

What is the difference between the /boot partition files and the /boot directory in root? [duplicate]

After having trouble with booting Linux after installing Windows 7 on a separate SSD, I am just wondering, what is the benefit of creating a separate /boot partition during installation? I remember ...
1
vote
1answer
109 views

An error during boot that I can not see

When I boot fedora, It shows an failure about modules and it disappears and then splash appears. I checked the /var/log/boot.log but there was no errors or failures there. Where can I find it?
1
vote
2answers
150 views

Linux fails with starting on a dualboot system after Windows update

I have Windows 7 and Kali Linux on my computer, normally I don't use windows anymore. But today I started windows and it updated itself. I am writing my thesis and all my stuff is in Linux so I really ...
1
vote
1answer
381 views

Where in the kernel /dev/kmsg gets initialized?

I'm trying to figure out at which point in the boot up process /dev/kmsg gets initialized and can thus be written. On my system the first line that occurs in dmesg is printk(KERN_INFO "Initializing ...
1
vote
1answer
309 views

Problem booting Ubuntu (or any OS), even after doing clean installs

Summary: OS (Ubuntu / Windows) installs fine, but when the time comes to restart and boot, it doesn't boot. (Gets stuck; screen blinks and I am still at boot selector). Can boot to a live ...
2
votes
1answer
153 views

How to get more info about the boot message “Waiting for /dev to be fully populated”

during the boot of my Debian I see Waiting for /dev to be fully populated and then a timeout expires, the text is rapidly scrolling and so I cannot read it; the boot process continue with no ...
2
votes
1answer
445 views

How to save a file from an initramfs emergency shell?

I can't boot because of some strange error. There is an error report file generated for me, to supposedly submit it along with a bug report, or whatever. So to help me figure out what the problem is, ...
0
votes
0answers
251 views

New-installed debian system hangs on boot (probably a hardware issue, likely USB, maybe Ethernet?)

I recently migrated an entire system from Crunchbang 11 to vanilla Debian 8.1 (in the cleanest way possible --- backed it all up, blew away the old install, reinstalled the old /home and /usr/local, ...
1
vote
0answers
161 views

Getting “No DEFAULT or UI configuration directive found” when booting from USB [closed]

I made a bootable Freya-OS USB. It works fine in my laptop. But, when I am trying to boot my desktop from the USB, it shows this error: "No DEFAULT or UI configuration directive found". Syslinux ...
0
votes
0answers
203 views

Linux Mint doesn't recognize hdd in ahci mode after kernel upgrade

Sometimes ago after a kernel update (or more, I didn't reboot, just did sleep/resume day in day out) I finally tried to reboot and got kernel panic problem you can see at the screenshot ('VFS: cannot ...