Introduction: Why Can Your Computer Run? When you write code on Ubuntu, browse the web on Fedora, or come across news about the “HarmonyOS computer coming soon” on your phone, have you ever wondered how these systems actually work behind the scenes? The key to the answer lies in the relationship between the Linux kernel … Read more
Click the blue “Most Programmer” to follow me! Add a “star“, every day at 18:03 to learn technology together Redirection Standard input stdin: code is 0, use < or <<Standard output stdout: code is 1, use > or >>Standard error output stderr: code is 2, use 2> or 2>>Special syntax: write both stdout and stderr … Read more
Open-source tools like Linux Malware Detect and Chkrootkit can alert you to unwanted visitors on your server. Translated from “Linux Security: Scan Your Servers for Rootkits With Ease” by Jack Wallen. Linux is one of the most secure operating systems on the planet. However, nothing is absolutely secure, and if a server is connected to … Read more
As a Linux operations engineer, mastering command delimiters is a key skill to enhance work efficiency. This article will detail commonly used command delimiters in the CentOS7 system and their usage techniques, helping you operate the command line with ease. 01 Basic Delimiters Semicolon (;) and Logical AND (&&) 1. Semicolon (;) – Execute sequentially … Read more
In Linux systems, there are various commands and methods to view the status of remote login users. Here are some commonly used commands and techniques: 1. Using the who command The who command is used to display information about users currently logged into the system, including usernames, login times, and login terminals. It can also … Read more
In the digital age, operations and maintenance engineers often have a few “invisible employees” on their computers—these tools never complain about overtime, are on standby 24 hours a day, and complete every task on time. This is the superpower that Linux scheduled tasks provide to the system. When you notice that the server automatically backs … Read more
World Trade Center 1. What is mcookie http://man.he.net/man1/mcookie mcookie – Generates authentication tokens for the X Window System authentication tool xauth mcookie is a command-line tool that runs on Unix-like operating systems, primarily used to generate random 128-bit hexadecimal numbers. These numbers are highly random and unpredictable, making them commonly used as session keys, unique … Read more
In today’s digital age, multi-core processors have become standard in computer systems, from our everyday office computers to the massive server clusters in data centers. This hardware advancement allows computer systems to handle multiple tasks simultaneously, greatly enhancing computational efficiency. Just like a busy traffic hub with multiple lanes, vehicles move back and forth, seemingly … Read more
The scripts required for this article can be directly copied in the format of this article: train_script.sh #!/bin/bash train=( " ____ " " _|____|____ " " | _________ | " " | _ _ | " " |_| |_| |_| " ) cols=$(tput cols) train_width=0 for line in "${train[@]}"; do (( ${#line} > train_width )) … Read more
Warm Reminder Reading on WeChat public account may result in poor code formatting, incorrect formatting after copying code, outdated content, and advertisement issues. It is strongly recommended to click the Read the Original link at the bottom left of the article for viewing. Tips Changing Network Interface Names to eth0 and eth1 in Linux Systems … Read more