[archlinux] linux boot process/order/stage

信息量好大 --！

神教读物，无人能比：

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

IBM的高质量文档

https://www.ibm.com/developerworks/library/l-linuxboot/

https://www.freedesktop.org/software/systemd/man/bootup.html#

init process： https://en.wikipedia.org/wiki/Linux_startup_process

sysv init script

upstart 与sysv向上兼容

openrc  gentoo/freeBSD 等在使用   https://en.wikipedia.org/wiki/OpenRC

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

　　https://www.freedesktop.org/wiki/Software/systemd/

　　http://0pointer.de/blog/projects/systemd-for-admins-1.html

runit。

一个对比：https://wiki.archlinux.org/index.php/Init/Rosetta

process supervison: https://en.wikipedia.org/wiki/Process_supervision

https://wiki.archlinux.org/index.php/Kernel_modules_(%E7%AE%80%E4%BD%93%E4%B8%AD%E6%96%87)