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Questions tagged [boot]

The boot phase broadly refers to the set of operations that a computer system performs between power-on and access to a graphical/textual shell. Do NOT use this tag for Spring Boot or Twitter Bootstrap. Use [spring-boot] and [twitter-bootstrap] instead.

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Why does the BIOS entry point start with a WBINVD instruction?

I'm investigating the BIOS code in my machine (x86_64 Linux, IvyBridge). I use the following procedure to dump the BIOS code: $ sudo cat /proc/iomem | grep ROM 000f0000-000fffff : System ROM $ sudo dd if=/dev/mem of=bios.dump bs=1M count=1 Then I…
user10865622
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java: cannot access org.springframework.boot.SpringApplication bad class file

java: cannot access org.springframework.boot.SpringApplication bad class file:…
sravan
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Startup script with systemd in Linux

Can I do This start up service below, there are no errors showing once run, but the server script below does not run! ln /lib/systemd/aquarium.service aquarium.service systemctl daemon-reload systemctl enable aquarium.service systemctl start…
Ossama
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How does the GRUB 2 UEFI loader know where to look for the configuration file (or where the 2nd stage's files are located)?

If I use GRUB 2 on a GPT-enabled partition, how does the loader "know" where to find its configuration file and other second stage's files? Note: I found some mentions about a configuration file which is located in the same folder as GRUB's EFI…
Sap
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how multicore processors boot?

talking in very low level, how the cores are initialized ?
Ahmed Khalaf
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14
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Do normal x86 or AMD PCs run startup/BIOS code directly from ROM, or do they copy it first to RAM?

I understand modern computers have modified Harvard architectures. Can the fact that they can read instructions from somewhere other than where they hold data allow them to fetch instructions directly from ROM chips? Do they load the BIOS to RAM…
salvador p
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after upgrade 18.04 no gui available only tty

After upgrading my Ubuntu desktop from 17.10 to 18.04, everything went smooth until I restarted my PC. The first suspicious thing I noticed was that it has the same grub with 17.10 - it selected the old grub from the menu (auto-select) and then…
Mr.P
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Starting Docker-Engine on boot

When I restart my host, I want my docker engine to start on boot. Is this possible? Can anyone point me in right direction ? My OS is RHEL 7.3 and my /usr/lib/systemd/system/docker.service fiel looks like: [Unit] Description=Docker Application…
Akki
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14
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How can I autorun Android Chrome homescreen app on startup

After adding a certain website to homescreen through Chrome for Android, I'm looking for a way to autorun that homescreen app as the device boots up. I found a few apps in the Google Play store that offer that behaviour but they don't list Chrome…
kindofone
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Linux: Start daemon on connected USB-serial dongle

On my Linux (Angstrom distro on BeagleBone Black) I have a USB dongle which presents as a serial port and per default is available as /dev/ttyUSB0 I want to start a daemon, which will connect to the serial port and make it available as a socket. I…
Philipp
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Implementing a Sticky Service in android/flutter

I need to add a native sticky background service in a flutter application, in order to achieve 2 things: Starting at boot time and running in background indefinitely Exchange data with the main Dart activity, in a message passing fashion However,…
docdev
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Failed to start PostgreSQL Cluster 10-main when booting

when I try to boot Ubuntu, it never finishes the boot process because it appears the message "Failed to start PostgreSQL Cluster 10-main." I also get the same message with 9.5-main. But lets focus on 10. When I execute: systemctl status…
Ignasi
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Launch FCM services on boot without the activity

I've followed the Firebase Quickstart Messaging Tutorial, and I've a problem. I'd like to launch the two services (MyFirebaseMessagingService and MyFirebaseInstanceIDService) on the boot of the system. For that, I've added the RECEIVE_BOOT_COMPLETED…
Drarig29
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Understanding Linux load address for U-Boot process

I'm trying to understand embedded Linux principles and can't figure out addresses at u-boot output. For example, I have UDOO board based on i.MX6 quad processor and I got following output from U-Boot: U-Boot 2013.10-rc3 (Jan 20 2014 -…
Ivo Slanina
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How can i put a compiled boot sector onto a USB stick or disk?

I'm actually interested in how an OS works, from the POST over the Boot process to the Kernel, GUI, etc. Well I have to start at the beginning: The bootsector Most tutorials only specify how to get your .bin bootstrapper onto an USB stick for Linux…
orossum
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