Tools
How to Convert WAV (MP4) to MP3 Using FFmpeg
Jason Yang · 01 Dec, 2025
Convert WAV or MP4 audio to MP3 with FFmpeg — the exact command-line options for input, bitrate, and quality, with examples you can copy and run.
Blog posts — page 21
Tools
Troubleshooting SecureCRT "Key Exchange Failed" with Ubuntu 22.04 (OpenSSH)
Jason Yang · 01 Dec, 2025
Fix the SecureCRT "Key exchange failed" error on Ubuntu 22.04. Learn how to enable compatible algorithms like curve25519-sha256 for a successful connection.
Programming Language
Pydantic vs dataclass - When to Use Which?
Jason Yang · 30 Nov, 2025
Pydantic vs dataclass: use Pydantic to validate incoming data, dataclasses for internal structures. Real examples and where each one breaks.
Cloud & DevOps
The OSI 7 Layers Model: Protocols, PDUs, and Devices
Jason Yang · 29 Nov, 2025
The OSI 7-layer model reference: each layer's function, protocols (HTTP, TCP/IP), PDUs, and devices in one table — great for CCNA and CompTIA prep.
Troubleshooting
How to Resolve ACPI Errors When Installing Ubuntu 22.04 on ASUS GA502GU-PB73
Jason Yang · 29 Nov, 2025
Fix the ACPI BIOS Error when installing Ubuntu 22.04 on an ASUS GA502GU: bypass the install freeze with GRUB parameters and repair the bootloader after.