information security

Overview of Privilege Escalation in Linux Systems

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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

Overseas AI Hot Topics – 3D Generation / Robot Security / AI Investment Boom

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Welcome to today’s summary of hot topics in overseas AI, robotics, and other cutting-edge technology fields. This daily report focuses on overseas developments, particularly key posts from American tech leaders, developers, and VC investors in the past 24 hours, highlighting the most liked or commented hot topics. 🔥 Revolution in Real-Time 3D Scene Generation Radiation … Read more

An Overview of HTTP: Various Concepts and Protocols Related to HTTP

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What is HTTP? HTTP stands for Hypertext Transfer Protocol, which is an application layer protocol used for transmitting information between network devices. It is the foundation of the World Wide Web, enabling communication between browsers and servers to load web pages. In simple terms, when you open a browser and enter a URL, HTTP acts … Read more

Linux Basic Practice Multiple Choice Questions – 22

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106. Question: To temporarily save iptables rules, the command used is iptables-save > ____. Option 1: rules.txt Option 2: config.rules Option 3: iptables.conf Option 4: saved-rules Correct Answer: 1 Explanation: To temporarily save iptables rules, the command iptables-save > rules.txt is used. This command saves the current firewall rules to a file named “rules.txt” for … Read more

Common Linux Commands: ln, cp, rm, find

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1. ln ln is short for link.Links can be understood as “shortcuts” or “aliases” for files/directories. There are soft links and hard links, with soft links being more commonly used. ln [options] <source file> <target link> Soft links, also known as symbolic links, are more like “shortcuts” in Windows systems. -s –symbolic Create a soft … Read more

Linux firewalld Commands

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1. View firewalld Rules sudo firewall-cmd –list-all 2. Add and Remove Port Access for All IPs Add Port Access sudo firewall-cmd –permanent –zone=public –add-port=22/tcp Remove Port Access sudo firewall-cmd –permanent –zone=public –remove-port=22/tcp 3. Add Rules for Allowing IP Whitelisting in firewalld After starting the firewalld service, all services are denied by default, and relevant IP … Read more

5-Day Crash Course on Linux for Information Security Engineer Exam Preparation

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Understanding your needs, Linux system security is an important assessment content in the Information Security Engineer examination. I have designed a 5-day Linux crash course closely aligned with the exam points, incorporating analyses of past exam questions to help you prepare efficiently. To prepare for the exam, knowledge related to Linux may appear in multiple-choice … Read more

Commonly Used Rust Backend Development Libraries

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Today, I will introduce some libraries that I commonly use during backend development with Rust. Basic Frameworks First, let’s discuss the basic development frameworks for backend. In Rust, the optional web frameworks include: Axum, Actix-Web, Warp, and Rocket. There are also some others not listed here due to their lower popularity compared to the above. … Read more

Essential for Python Beginners! Easily Handle Database Operations with the Orator Library and Say Goodbye to Complex SQL

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For those new to Python web development, does the thought of database operations make you feel overwhelmed? You just want to store some data or query some information, but you first have to learn complex SQL syntax and deal with various configurations? Today, I recommend a super user-friendly Python library—Orator. Using it to operate databases … Read more