Learn what rsync --delete does, common usage patterns, and key precautions, including a practical way to quickly clean a target directory using an empty source directory.
Learn how Git tracks executable permissions on Linux, with practical commands to add, remove, and verify the executable bit.
A structured guide to SKILL.md standard structure and four core principles for writing high-quality Skills.
A clear guide to IEEE 802.3af, 802.3at, and 802.3bt across power budget, wire pairs, and typical use cases.
An overview of Agent Skills core design principles, progressive disclosure, and practical impact on context-cost optimization.
A hands-on case study showing how non-programmers can direct AI in Codex to recognize formulas, convert them to LaTeX, and align cropped diagrams with formulas, including practical results and limitations.
A practical VS Code Codex guide covering installation, configuration, prompt patterns, and troubleshooting.
A practical overview of major LLM API options with a focus on free tiers, speed, and cost-performance.
How to move the 2.5G port to internal LAN on AX6600 Athena by editing DTS and swapping WAN/LAN1.