Linux operating system startup steps detailed description

Source: Internet
Author: User

1. Read the MBR information and start boot Manager

Windows uses NTLDR as the boot Manager, and if you have multiple versions of Windows installed on your system, you will need to select the system you want to enter in NTLDR.

Linux typically uses a powerful, configurable grub as the boot manager, and we'll show you how it is used in the Launch Management section.

2, load the system kernel, start the init process

The init process is the root process of Linux, and all system processes are its child processes.

3, the Init process reads the information in the "/etc/inittab" file and goes to the preset run level, running the script under the corresponding folder in the run level in order. Scripts are usually started with the "start" argument and point to a program in a system.

Typically, the startup script under the "/etc/rcs.d/" directory is executed first, followed by the "/etc/rcn.d/" directory. For example, if you set a run level of 3, then its corresponding startup directory is "/etc/rc3.d/".

4, according to the "/etc/rcs.d/" folder in the corresponding script to start the Xwindow server "Xorg"

Xwindow is a graphical user interface system under Linux.

5, start the login manager, waiting for users to log in

The Ubuntu system defaults to using GDM as the login manager, and you can log in to the system after you enter your username and password in the Login manager interface. (You can find a link in the "/etc/rc3.d/" folder named "S13GDM")

If you want Ubuntu to boot to command prompt each time, you can enter the following instructions:

$echo "false" | sudo tee/etc/x11/default-display-manager

When the next boot, will be in the command mode to start, if you want to change back to start X window, you can enter:

$echo "/USR/BIN/GDM" | sudo tee/etc/x11/default-display-manager

Related Article

E-Commerce Solutions

Leverage the same tools powering the Alibaba Ecosystem

Learn more >

Apsara Conference 2019

The Rise of Data Intelligence, September 25th - 27th, Hangzhou, China

Learn more >

Alibaba Cloud Free Trial

Learn and experience the power of Alibaba Cloud with a free trial worth $300-1200 USD

Learn more >

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: and provide relevant evidence. A staff member will contact you within 5 working days.