Common Linux Commands White: Regular files Blue: Directories Red: Compressed files Green: Executable files Copy: ctrl + insert Paste: shift + insert Clear screen: ctrl + l Cancel current command and re-enter: ctrl + c 1. ls Syntax: ls [options] [directory or file] Function: For directories, this command lists all subdirectories and files within the … Read more
ShellCheck is a tool for static code analysis, specifically designed to check Shell scripting languages. It helps users discover and correct common issues, potential errors, and inconsistencies in best practices within their scripts. Features Syntax Checking: ShellCheck can check the syntax of Shell scripts, ensuring that commands, syntax structures, and syntax rules within the script … Read more
1. Run______⑴_______ code, record the experimental results. 1.Program code: (Student to fill in) mkdir ./wuli201 mkdir -p wuli202/zhang3 mkdir–p ./wuli20/zhang3/li4/wang5 rm –r ./wuli20/zhang3/li4/wang5 rm –rf ./zhang3/wang5 cd /etc cd /media cd ~ or cd $HOME cd ~/wuli202/zhang3 cd ../../ cd ~ or cd $HOME cd /etc/ssh 2. Experimental results: (Student to fill in) 2. Run_____⑵____ … Read more
Question 1:What symbol represents the absolute path? How to represent the current directory and the parent directory? How to represent the home directory? What command is used to change directories?Answer:Absolute path: e.g., /etc/init.dCurrent directory and parent directory: ./ ../Home directory: ~/Change directory: cdQuestion 2:How to view the current processes? How to exit? How to view … Read more
This article is an original work by Teacher Liu from Yunbei Education. Please respect intellectual property rights. If you wish to share, please indicate the source. Unauthorized copying, adaptation, or reproduction without citation is not accepted. 1. Introduction to Crontab In Linux systems, crontab is a tool used to set up periodic tasks. It allows … Read more
Linux Shell Scripting from 0 to 1: Write Production Code in One Article 127 commands, 15 scenario templates, and 8 debugging tips, all provided at once! A must-save long article, recommended to share before reading 🚀 📑 Table of Contents Get Started: 30-Second Script “Hello World” Mind Map: A Diagram to Remember All Syntax Syntax … Read more
1. Shell Script Types (Primarily for System Automation) – sh (Bourne Shell): The native basic shell of Unix systems, it is the “ancestor” of most shells, with extremely simple syntax and strong compatibility. However, it only supports basic commands and simple logic, lacking complex features (such as functions and advanced variables), making it suitable for … Read more
Backing up is like insurance; you don’t need it every day, but when disaster strikes, such as accidental file deletion, disk failure, or ransomware attacks, being unprepared can be devastating. This is why a smart backup plan is essential. In this practice, I will show you how to schedule incremental backups using rsync and cron. … Read more
In the previous section, we wrote our first Shell script and learned how to use variables, read input, and pass parameters. In this article, we will continue to delve deeper into the “core capabilities” of Shell:Flow Control. Shell supports control structures similar to other programming languages: conditional judgments, loops, branches, etc., allowing you to write … Read more
In the first two parts, we learned the basics of Linux and Shell, and mastered a large number of commonly used commands. Now, it’s time to organize these commands into scripts to achieve automation! This article will guide you in writing your first Shell script, mastering the basic structure, execution methods, and syntax rules of … Read more