An overview on what actually happens behind the screen when your PC boots into Linux

The process of booting a Linux® system consists of a number of stages. But whether you’re booting a standard x86 desktop or a deeply embedded PowerPC® target, much of the flow is surprisingly similar. This article explores the Linux boot process from the initial bootstrap to the start of the first user-space application. Along the way, you’ll learn about various other boot-related topics such as the boot loaders, kernel decompression, the initial RAM disk, and other elements of Linux boot.

Link: Inside the Linux boot process