01-Course Arrangement

02-Inspirational formula and python experience

03-What is an operating system

04-Mainstream operating systems in different fields-01-Desktop operating systems

05-Mainstream operating systems in different fields-02-Server operating systems

06-Mainstream operating systems in different fields-03-Embedded operating systems

07-Introduction to virtual machines

08-A brief history of operating system development

09-Linux kernel version and distribution version

10-File directory structure under Linux system

11-Ubuntu system directory structure demonstration and introduction

12-Basic use of Ubuntu graphical interface

13-Linux Command-01-Clear Learning Goals

14-Linux Command-02-Enlarge or reduce the font of the terminal window

15-Linux Command-03-Clear the operating effects of 6 common terminal commands

16-Linux commands-04-6 simple drills on common terminal commands

17-Linux Command-05-Terminal Command Format

18-Linux Command-06-View terminal command help information

19-File and directory commands-01-Clear command classification and learning objectives

20-File and directory commands-02-Sharing auto-completion and command selection skills

21-File and directory commands-03-View hidden files and return to the previous directory

22-File and Directory Commands-04-Listing and File Size Options for ls

23-File and directory commands-05-Combined use of ls and wildcards

24-File and directory commands-06-Wildcard character group

25-File and directory commands-07-Common parameters of cd command

26-File and directory commands-08-Relative paths and absolute paths

09-Extensions to touch and mkdir commands

10-Extensions to the rm command

11-Goal determination and graphical interface demonstration

12-tree View the directory structure in a tree diagram

cp command to copy files

cp command -i option prompt before overwriting

cp command -r option to copy directory

mv command moves files or directories

mv command to rename files or directories

Basic usage and comparison of cat and more

The -b and -n options of the cat command output line numbers

grep to find file contents

grep pattern search at the beginning/end of the line

echo and redirection

The concept and basic use of pipelines

Shut down and restart

The concept of network card and IP address

Introduction to the functions of ifconfig and ping

ifconfig queries network card information

ping test network connection

An introduction to how SSH works

The concept of domain name and port number

Introduction to ssh command format and determination of drill goals

Mac computer uses ssh to connect to ubuntu

PuTTY installation and exit login

Installation of XShell - free and setting language

scp function and command format

Demo of scp in Mac terminal

FileZilla file transfer under Windows

Determine the target/understand the .ssh directory

Password-free login setup steps

How password-free login works

Configure an alias for a remote computer

learning target

Basic concepts of users/permissions/groups

Introduction to ls -l output information

Extension of the meaning of ls -l hard link number

chmod changes file permissions

chmod changes directory permissions

Super user introduction

Add group/delete group/confirm group information

Group exercise goals determined

Walkthrough for chgrp to modify the group to which a directory belongs

Create new users useradd and passwd

The role of the m option and deleting user userdel

id view UID and GID and introduction to passwd file

who和whoami

usermod sets primary and additional groups

usermod specifies user login shell

which view command location

su switches users

Introduction to permission commands and walkthrough of chown/chgrp

Introduction to numerical representation of chmod

chmod walkthrough -R recursively changes directory permissions

learning target

Date and cal check system time

df and du check disk and directory space usage

Introduction to process concept

Basic use of ps command

Basic usage of top command

Basic usage of kill command

Learning objectives and basic use of find command

Introduction to the concept of file soft links

Determination of drill steps for file soft links

Walkthrough implementation of file soft links

File hard link walkthrough

Introduction to how file soft and hard links work

Introduction to tar package and command format introduction

Packing and unpacking walkthrough

Introduction and walkthrough of gzip compression and decompression

Introduction and walkthrough of bzip2 compression and decompression

Introduction to apt and command format introduction

apt software installation walkthrough

Set up software source

The purpose of learning vi

vi and vim and the characteristics of vi

Open or create a new file

Open the file and define the specified line

Delete swap file

Responsibilities and switching methods

Work mode switching drill

Learning roadmap

Direction and intraline movement

Line jump and page up and down

Paragraph switching and bracket switching

Use markers to return to previously edited code locations

Three ways to select text

Introduction to undo and redo commands

Delete command walkthrough

Undo and Undo

Copy and paste walkthrough

The contents of the system clipboard cannot be pasted using p

Replace command

Indentation and repetition

Find a string or word

Global replacement

Replace viewable area

Confirm replacement

6 commands to enter edit mode

Use with numbers

Use visual blocks to add comments to multiple lines of code

Last line command expansion

w command phased backup code

Split screen command walkthrough