When we switch on the cpu of our computer it follows a series of steps to start.
Ist BIOS of our system starts which is loaded by the manufacturer.BIOS loaded MBR which is located in our hard disk .MBR consist of bootloader & partition table for our operating system .
Bootloader(like GRUB) starts our kernel by selecting from a no of kernels available for the os.
After booting kernel starts the init process which further initialtes other drivers & programs.
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