Wayland and X11 (also known as the X Window System) are two different display server protocols used to manage graphical interfaces in Linux and Unix-like operating systems. Their main differences lie in design philosophy, architecture, and performance. Here are the key distinctions:1. Design Philosophy and ArchitectureX11: Historical Background:X11 has been the standard display server protocol … Read more
Introduction: The Invisible “Layer” In modern web architecture, an HTTP request from a user often passes through multiple checkpoints before reaching the actual business logic (backend server): CDN, load balancer, WAF, reverse proxy… We can imagine this model as a tightly secured building: Frontend Proxy (e.g., Nginx, CDN): This is your building’s “security guard”. He … Read more
🐧 Linux System User and Group Management This chapter mainly explains the methods of Linux user and group management, including account addition, modification, deletion, password management, group management, and related system file structures. This knowledge is fundamental for system maintenance, security control, and permission management. 🧭 1. Management of Linux System User Accounts Linux is … Read more
Nexpose 8.26.0 for Linux & Windows – Vulnerability Scanning Rapid7 on-prem Vulnerability Management, released Oct 29, 2025 Please visit the original link: https://sysin.org/blog/nexpose/ to view the latest version. This is an original work, please retain the source when reprinting. Author’s homepage:sysin.org Rapid7 Nexpose Vulnerability Scanner A locally deployed vulnerability scanner A powerful vulnerability management solution … Read more
Deployment of Linux FTP/SFTP File Services In today’s digital age, file transfer is a core requirement for data exchange and collaboration in enterprises. As a representative of open-source server platforms, Linux supports efficient and secure file service deployment, with FTP (File Transfer Protocol) and SFTP (Secure File Transfer Protocol) being the most commonly used protocols. … Read more
In-Depth Analysis of Linux File Permissions: From Basics to Special Permissions 1. Linux File Types: Understanding the “ID Card” of Files 2. Basic Permissions: The Mystery of rwx 3. Permission Management Commands 4. Special Permissions: SUID, SGID, Sticky Bit 5. umask: Default Permission Control 6. ACL: Fine-Grained Permission Control 7. Practical Case Analysis 8. Permission … Read more
Archive Work Responsibility System 1. Responsibilities of the Main Person in Charge 1.1 Overall leadership of the unit’s archive work, fulfilling the primary responsibility for the integrity and security of archives. 1.2 Lead the study of the “Archives Law of the People’s Republic of China”, “Regulations for the Implementation of the Archives Law of the … Read more
1. A Delayed Confession: From Nara’s Gunshots to Court Testimony “I just wanted to kill him; I never intended to escape from the beginning.” When Tetsuya Yamagami uttered these words from the defendant’s seat at the Tokyo District Court, more than three years had passed since the two gunshots rang out on the streets of … Read more
Set your Wi-Fi password to 2444666668888888. So when someone asks, tell them it’s 12345678.
Privilege escalation in Linux systems refers to the process of elevating from a low-privilege user (such as a regular user or www-data) to a high-privilege user (such as root). This is very common in penetration testing (Pentest) or security research, but please note: it should only be used in legally authorized environments, and misuse may … Read more