The history command is an indispensable and powerful tool in the daily use and management of Linux systems. It not only records the commands executed by the user but also helps us quickly review the operation history, troubleshoot issues, and even improve work efficiency to some extent. This article will start with the basic usage … Read more
Linux | Red Hat Certified | IT Technology | Operations Engineer 👇 Join our technical exchange QQ group with a note【Public Account】for faster approval Before explaining the permission issues, I would like to briefly introduce the essence of commands and the role of the command line interpreter. Introduction 01 The Essence of Commands Entering a … Read more
1. Difference Between Commands and Command Lines 1. Command Line: The Linux terminal (Terminal), a command prompt page, operates the system in pure “character” form, allowing various character-based commands to issue operational instructions to the system. 2. Command: A Linux program, where a command is essentially a program. Commands do not have a graphical interface … Read more
For practical entry into Linux, the first essential knowledge point is the basics of command line operations, which is the core interaction method of the Linux system, covering the following key contents: 🔍 1. Terminal Interface and Basic Command Structure Terminal All operations are executed through the terminal, which is the window for inputting commands. … Read more
Vim (Vi IMproved) is a powerful terminal text editor, serving as a valuable assistant for programmers and system administrators in UNIX/Linux environments. Unlike graphical editors, Vim is keyboard-centric, emphasizing efficiency and precise control. 🧩 1. What is Vim? Vim is an enhanced version of the early UNIX editor <span><span>vi</span></span>, focusing on extensibility, customizability, and high … Read more
Warm Reminder If you like this article, please share it with your friends. If you have any questions or want more information, please follow or leave a message. In Linux systems, viewing file contents is an essential part of daily management tasks. For large files, trying to view all content at once can result in … Read more
In the previous two articles, I introduced how to purchase a cloud server for just 99 yuan and set up your own website, and explained how to gradually master user management operations on the cloud server ECS. In this article, we will gradually get started with Linux operations, focusing on command line usage. It can … Read more
In Linux, the cp command by default prompts for confirmation before overwriting (due to the system alias alias cp=’cp -i’). Here are several methods to force overwrite without prompting: 1. Bypass the alias using a backslash \cp -rf source_file destination_file The backslash \ ignores the alias and directly calls the native cp command, where -rf … Read more
Understanding the Differences Between Linux Commands ‘su’ and ‘sudo’ Previously, I was confused about the two commands su and sudo. Recently, I specifically searched for information on this topic and finally clarified the relationship and usage of both commands. This article aims to systematically summarize the findings. 1 Preparation Since this blog involves user switching, … Read more
1. less – A Paging Tool to View File Contents Syntax: less filename Description: You can press Enter or Page Up/Page Down to navigate through the pages. To exit when you reach the end of the content, press ‘q’. [root@VM-8-13-centos ~]# less abc hello world hello world abc(END) 2. more – View File Contents by … Read more