Boot Process :
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Booting Process. The heart of a modern computer is one or more Central Processing Units. A CPU gets its instructions from memory. The CPU reads instruction from the BIOS and searches for the hard disks, CD drives and other hardware. The BIOS program looks at the first sector for boot code. In computing, booting (or booting up) is the initialization of a computerized system. The system can be a computer or a computer appliance. The booting process can be “hard”, after electrical power to the CPU is switched from off to on (in order to diagnose particular hardware errors), or “soft”, when those power-on self-tests (POST) can be avoided. Soft booting can be initiated by hardware such as a button press, or by software command.
1) Booting Sequence
2) Kernel Initialization
3) Init Process
Linux Information & Scripting 