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KnightLi Blog

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66 pages

Technical Docs

Technical documentation, command references, and step-by-step implementation notes for tools, systems, and development workflows.

rsync --delete Explained and Practical Directory Cleanup

How Git Tracks File Executable Permission (+x)

Hugo Shortcode Practice: bundle-file (Keep Multilingual Files and Attachments in One Page Bundle)

How to Create and Use Skills: SKILL.md Specification and Practical Principles

IEEE 802.3af/at/bt (PoE) Differences Explained

What Is Agent Skills: From Design Principles to Context Optimization

Common Misconceptions About WD HC620 SMR Drives and How to Use Them Correctly

How Non-Programmers Can Direct AI to Do the Work: Extracting Diagrams and Math Formulas from an Image (Hands-On Example)

How to Use Codex in VS Code (From Setup to Efficient Real-World Workflow)

LLM API Landscape (Free and Cost-Effective Options)

OpenWrt on JDCloud AX6600 Athena: Move the 2.5G Port to LAN and Swap WAN/LAN1

C Struct Initialization and Character/String Fields

GNU C `attribute` Guide

Fix pyOCD Failing to Detect Some DAPLink Probes on Ubuntu

Compress Microsoft Office Word Documents (.docx)

JTAG vs SWD: Pros and Cons

CMake Basics and Practical Templates

STM32/PY32 GPIO: 8 Input/Output Modes Explained

Install and Use pyOCD + J-Link on Ubuntu 24.04

Python Compression: Create Encrypted Archives in ZIP and 7z

FFmpeg H.265 Transcoding: Different Encoders, Software vs Hardware Speed Comparison

Ubuntu + LSI: Check Drive Health with smartctl, Locate Drives with storcli64, and Perform Safe Hot Swap

Fixing OpenWrt WireGuard Auto-Reconnect Issues

Fixing vgextend Error: Devices have inconsistent logical block sizes

Using LVM to Manage Disks on Ubuntu

Encode MP3 with ffmpeg

How to Safely Hot-Swap HDDs (Do It Right and Avoid Hardware Damage)

inpaint-web: Free, Open-Source Image Inpainting, Watermark Removal, and Super-Resolution Tool

Common Wi-Fi Channel Frequency Ranges: 2.4G and 5G (5.2G / 5.5G / 5.8G)

Xiaomi AX3600: MIBIB and Firmware Compatibility

OpenStick Debian System Tuning: Wi-Fi AP and Compression Optimization

Rebuild Debian Firmware for OpenStick Wi-Fi Stick

Resetting mdadm RAID on Ubuntu 22.04

Fixing Slow NTFS Write Performance on Ubuntu 22.04

DIY Low-Cost 256GB Memory Workstation with HP Z440 Motherboard

Verify Whether Certbot Auto-Renew for Let's Encrypt Is Working

Build a Git Server on Synology NAS and Schedule Backup with Hyper Backup

Set IP Address for Mellanox Infiniband Adapter on Ubuntu 20.04

Switch Mellanox Infiniband Between IB / Ethernet / VPI Modes

Translate Full Markdown Documents with translate.google.cn

Translate Full Markdown Documents with translate.google.cn (V2)

Connect Two OpenWrt Networks over the Internet with WireGuard

Install GoAccess on Ubuntu + Nginx for Real-Time Site Analytics

Install screen on Synology NAS

Google Translate Query Parameters Explained

Hugo Permalinks, URL, Slug, and SEO Optimization

Use Beautiful Soup in Python to Extract HTML Meta Keywords and Description

Install Erlang on Ubuntu 20.04 with apt

Ubuntu 20.04: HP 544+FLR-QSFP, RDMA and NVMe over Fabrics

UPS Power-Outage Auto Shutdown Script for Linux