Linux boot program execution sequence

Article Title: Linux system boot program execution sequence. Linux is a technology channel of the IT lab in China. Programs that include desktop applications, Linux system management, kernel research, embedded systems, open source, and other basic categories of boot are as follows:

1. Load BIOS hardware information and obtain the code of the first boot device;

2. Read the boot information of the MBR boot Loader (lilo, grub, spfdisk, etc.) of the first boot device;

3. Load the core information of the Kernel Operating System, start to decompress the Kernel, and try to drive all hardware devices;

4. run the init program in Kernel and obtain the run-level information;

5. Run the/etc/rc. d/rc. sysinit file in init;

6. Start the core plug-in Module (/etc/modprobe. conf );

7. init execute the run-level various batches (Scripts );

8. Run the/etc/rc. d/rc. local file in init;

9. Run the/bin/login program and wait for the user to log on;

10. After logging in, start using Shell to control the host.