A complete guide to Linux/Unix signals and process management. Learn how Ctrl+C, Ctrl+Z, kill, pkill, nohup, &, and tmux work behind the scenes. Discover how to gracefully terminate processes, run tasks in the background, keep services alive after logout, and manage multiple sessions with tmux for efficient system administration. 1. Introduction In the Linux/Unix world,…

Extracting structured data from unstructured documents (like PDFs and images) can get tricky fast. With the rise of foundation models and purpose-built APIs, it’s now possible to turn even a messy invoice into clean JSON with just a few lines of code. So I will compare three different ways to parse documents: using OpenAI’s GPT‑4o,…

Intro Grzegorz Tworek recently published some C code demonstrating how to steal and impersonate Windows tokens from a process. The standard way to do this is with the OpenProcess, OpenProcessToken, DuplicateTokenEx, and ImpersonateLoggedOnUser APIs. Grzegorz shows how to achieve the same using Nt* APIs, specifically NtOpenProcess, NtOpenProcessToken, NtDuplicateToken, and NtSetInformationThread. Because I’m a C# junky, I…

Back when I started managing servers, I remember staring at the terminal, completely lost. The blinking cursor felt like it was mocking me. Fast forward a few years, and now Linux Commands feel as natural as breathing. Whether you’re currently managing Linux servers or planning to, these twenty Linux Commands will prove essential time and time again. 1. ssh…

What is BadUSB? Using the STM32F407 development board, we’ll study HID device development and implement a low-cost BadUSB. This article uses the development board for testing. Those with the means can also create a PCB prototype and print the enclosure to create a highly realistic BadUSB.BadUSB is an attack that masquerades as a USB HID…

A complete guide to Python asynchronous programming with asyncio. Learn the basics of async/await, concurrency, and best practices to build faster, more efficient web apps, API calls, and data pipelines with Python. As developers, one of the challenges we constantly face is making our applications faster and more efficient. Whether you’re building a web app,…

Many engineers and hobbyists often confuse the applications of ferrite beads, 0Ω resistors, and inductors.In our previous discussion, we compared these three basic components from four perspectives—appearance, schematic symbols, internal structure, and practical applications (Ferrite Beads vs 0Ω Resistors: Principles, Characteristics, and EMC Application Guide). However, one question remained unanswered: When implementing single-point grounding, should…

A detailed comparison between ferrite beads and 0-ohm resistors, covering appearance, schematic symbols, internal structure, and usage. Learn how ferrite beads excel in EMC noise suppression, high-frequency interference filtering, and single-point grounding. There’s a small component that can be used just like a 0Ω resistor, but it can also function like an inductor.Can you guess…

Model Context Protocol (MCP) is gaining traction, but critical security gaps remain. This guide explores common MCP vulnerabilities in the 2025-06-18 release — from misconfigurations and credential leaks to command injection and remote code execution — helping developers secure their MCP deployments. MCP adoption is picking up quickly, so I have been digging into the…

Python learners and curious developers, you’ve probably heard this famous phrase in the programming world: “Everything is an object in Python.” It sounds almost mystical, but it’s actually one of the core reasons Python is so flexible and powerful. This article will take you from the very basics of“What exactly is an object?”all the way…