Startup procedure

1. PC boot ROM calls the boot loader (e.g. LILO) from master boot record.
2. LILO takes the control, asking for which Linux kernel to boot.
3. Control passed to the selected Linux kernel.
4. Linux kernel checks and initializes various supported hardware components.
5. Mounting filesystem read-only.
6. Run /sbin/init
7. File system checking
8. Change to runlevel specified in /etc/inittab
9. Remounting filesystem according to /etc/fstab
10. Run the correconding rc scripts.
11. Start virtual terminals (getty).
12. Start X accordingly.