Perhaps it's easier to pick an OS and understand its boot process? And since no one's mentioned let me say that TLDP is a comprehensive, understandable, and th

Perhaps it's easier to pick an OS and understand its boot process? And since no one's mentioned let me say that TLDP is a comprehensive, understandable, and the authoritative source on all things Linux. That said, here's two documents from TLDP. 1. [Boot process, Init and shutdown] https://tldp.org/LDP/intro-linux/html/sect_04_02.html https://tldp.org/LDP/intro-linux/html/sect_04_02.html 2. [The boot process in closer look] https://tldp.org/LDP/sag/html/boot-process.html https://tldp.org/LDP/sag/html/boot-process.html