The following article is a summary of common knowledge in Shell programming, covering syntax and techniques. 1. Basic Concepts of Shell 1. Introduction The Shell is a command-line interpreter, an interface for users to interact with the kernel, receiving user-input commands and invoking system functions for execution. The Shell is loaded into memory when logging … Read more
As global energy consumption in data centers continues to rise, finding ways to reduce energy consumption while meeting the increasing demand for computing power has become an urgent issue. Recently, researchers from the University of Waterloo in Canada proposed an innovative solution: by modifying approximately 30 lines of code in the Linux kernel’s network stack, … Read more
Introduction A concerning new type of supply chain attack has emerged, targeting Linux developers working with the Telegram bot ecosystem. Discovered in early 2025, multiple malicious npm packages disguised themselves as legitimate Telegram bot libraries to provide SSH backdoors and steal sensitive data from unsuspecting developers. These domain-squatted packages accumulated approximately 300 downloads over several … Read more
1. The “Genetic Code” of File Permissions 1. File Type Identifiers First Character File Type Typical Examples d Directory /home, /var/log – Regular File index.html, app.py l Symbolic Link /usr/bin/python3 → python3.9 b/c Block Device/Character Device File /dev/sda (disk), /dev/ttyS0 (serial port) 2. Structure of Permission Triplets The permissions for each user type are composed … Read more
A critical vulnerability exists in the USB audio driver of the Linux kernel that may lead to out-of-bounds memory reads. This vulnerability has been patched by Takashi Iwai from SUSE. If an attacker gains physical access to the system, they can exploit malicious USB devices to achieve privilege escalation, tamper with system memory, or execute … Read more
Monitoring and Tuning the Linux Networking Stack: Receiving Data In Brief This blog post explains how computers running the Linux kernel receive packets and how to monitor and tune various components of the networking stack as packets flow from the network to user-space programs. Update: We have published a corresponding article: “Monitoring and Tuning the … Read more
First, install Wine.After the installation is complete, use the Wine command.Second, navigate to the folder where the EXE file is stored.Enter the command: wine xxx.exe Then the installation is complete, and the application will be available in the applications menu.
Good news for Linux and macOS users!Wine 10.6 has officially been released as the sixth update of the stable 10.x series. This update is not just a patch for the previous version; more importantly, it brings several significant upgrades that tech enthusiasts are excited about. Wine is a free and open-source compatibility layer that allows … Read more
In Linux systems, process management is a very important function. The pstree command displays running processes in a tree diagram format, which is more intuitive than the ps command, making the output visually appealing. Today, we will learn about this super useful command—pstree.1. What is the pstree Command?The pstree command is used to display running … Read more
Introduction Today, I will share how to set up a lightweight personal blog, VanBlog, on the Linux Ubuntu system, and use the Cpolar internal network penetration software to generate a public address for easy remote access to the locally deployed site anytime, anywhere. No public IP is required, and there’s no need to set up … Read more