title: "Boot Device" # Title of the blog post. date: 2020-12-23T10:57:10+08:00 # Date of post creation.

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note tags:

UEFI/BIOS

Insert Lead paragraph here.

Linux After Press Power Button

https://www.thegeekstuff.com/2011/02/linux-boot-process/

6 Stages of Linux Boot Process

BIOS - Basic Input/Output system executes MBR

MBR - Master Boot Record executes GRUB

GRUB - Grand Unified Bootloader executes Kernel

Kernel - Kernel executes /sbin/init

Init - Init executes runlevel programs

Runlevel - Runlevel programs are executes from /etc/rc.d/rc*.d/

OpenRC VS Systemd

https://wiki.archlinux.org/index.php/Systemd

https://wiki.gentoo.org/wiki/OpenRC

对于Gentoo默认是使用OpenRC,现在大量的Linux发行版都使用Systemd(Archlinux也是使用Systemd),在看了一些资料后了解,这两个都是作为PID1的init(其中其实还有一个SysVinit,也是大量发行版以前的init),且gnome也是绑定了Systemd,对于Systemd可以理解为有高度集成的一个init,其中包括timedatectl,systemctl,journalctl,hostnamectl等等,还有对很多的操作,有很多对于Systemd的负面评价,在看完后装Gentoo时决定,再学习一次试一下OpenRC看看还需要什么服务的...