Linux boot sequence in a nutshell
The BIOS -> MBR -> Boot Loader (GRUB or LILO) -> Kernel -> initrd -> /sbin/init - >
/etc/inittab ->
/etc/rc.d/rc.sysinit ->
/etc/rc.d/rcX.d/ #where X is run level in /etc/inittab
run script with K then script with S
The BIOS -> MBR -> Boot Loader (GRUB or LILO) -> Kernel -> initrd -> /sbin/init - >
/etc/inittab ->
/etc/rc.d/rc.sysinit ->
/etc/rc.d/rcX.d/ #where X is run level in /etc/inittab
run script with K then script with S