Software
Linus Torvalds
Linus Torvalds (b. 1969) is a Finnish-American software engineer — creator of the Linux kernel (1991) and Git (2005), two of the most widely-deployed pieces of software in history. Effectively benevolent-dictator-for-life of the Linux kernel for 30+ years. Famously direct (sometimes abrasive) communication style; apologized for past conduct in 2018 and took a sabbatical. His design philosophies (pragmatism over purity, reject abstractions that don't earn their keep, code matters more than theory) shape nearly all major open-source kernel and infrastructure projects.
Developer Certificate of Origin (DCO)
The DCO is a short legal statement a developer attaches to every contribution (via the Signed-off-by line in git) affirming they have the right to submit the code under the project's license. Originally introduced by Linus Torvalds in 2004 during the SCO lawsuit; now used by the Linux kernel, Git, Docker, Kubernetes, and most major open-source projects. Unlike a CLA, the DCO doesn't grant additional rights — it's an attestation of provenance.
llama.cpp
llama.cpp is Georgi Gerganov's C++ inference runtime for LLMs — pure CPU/GPU inference with no Python dependency, GGUF quantization format, support for dozens of model architectures. It's why you can run 70B-parameter models on a laptop, and the backbone of LM Studio, Ollama, Jan, and countless local-LLM projects.
ZFS (Zettabyte File System)
ZFS is an integrated filesystem + volume manager + RAID (originally Sun Microsystems 2005, now OpenZFS) that collapses Linux's traditional ext4+LVM+mdadm stack into one system. Key features: copy-on-write, block-level checksums with self-healing, instant snapshots, RAID-Z without the RAID-5/6 write hole, transparent compression, native encryption.
Wirth's Law
Wirth's Law (coined by Niklaus Wirth in 1995): 'Software gets slower faster than hardware gets faster.' A compact articulation of software-bloat-consuming-hardware-gains that has held remarkably well across 30 years despite 500-2000x hardware improvements.
WebAssembly and WASI
WebAssembly (Wasm) is an architecture-agnostic low-level bytecode that any compliant runtime can execute — originally for browsers, extended by WASI (WebAssembly System Interface) for server/desktop. WASI 0.3 shipped Feb 2026; 1.0 expected late 2026. The Component Model lets modules mix languages. Docker founder Solomon Hykes: 'If WASM+WASI existed in 2008, we wouldn't have needed to create Docker.'
Linux Kernel AI Coding Assistants Policy (2026)
Linux 7.0 shipped Documentation/process/coding-assistants.rst: AI-assisted contributions must be GPL-2.0-only compatible; AI agents cannot add Signed-off-by tags (legally binding DCO requires human standing); Assisted-by tag recommended (not enforced); human developer takes full legal and reputational responsibility with no exceptions. Proposed by Sasha Levin himself — the maintainer whose undisclosed AI-assisted patch triggered the debate. Linus: 'stop debating AI slop in kernel docs — bad actors won't follow the rules anyway.'
Ken Silverman and the Build Engine
Ken Silverman wrote the Build engine in his early 20s — the 1995 3D game engine powering Duke Nukem 3D, Shadow Warrior, Blood, and a dozen other mid-90s shooters. Famous for sloped floors, variable-height ceilings, and room-over-room on 1996 consumer hardware that shouldn't have handled it. Now Chief Computer Scientist at Voxon, building the VX2 volumetric display renderer.
Cosmopolitan Libc
Justine Tunney's Cosmopolitan Libc produces 'Actually Portable Executables' (APE) — a single binary that runs natively on Linux, macOS, Windows, FreeBSD, OpenBSD, NetBSD, and BIOS via clever polyglot headers. No VM, no runtime, native performance. Used by Mozilla's llamafile.
DIY vs Appliance Homelab Tradeoff
A recurring decision in self-hosted infrastructure: build a DIY server (deep learning, max flexibility, ongoing maintenance cost) vs buy an appliance (ZimaOS, Synology, Unraid — shallow integration, less learning, lower maintenance burden). Most people over-invest in DIY early for learning reasons, then shift to appliances as their time becomes more valuable. Knowing when to shift is a recurring question, not a one-time decision.
Zig Programming Language
Zig is a systems programming language created by Andrew Kelley in 2015 as a modern alternative to C — emphasizing explicit control, compile-time execution, cross-compilation, and memory safety without a garbage collector. Used by Bun (JavaScript runtime), Uber backend services, and increasingly by malware authors for its unusual AV-detection profile.
Hard-Won Home Server Lesson: Configure Ethernet Before Install
Server OS installers (Proxmox, TrueNAS, Ubuntu Server, Debian) gate the network-configuration step on active link detection — if the installer doesn't see a live ethernet connection, it silently skips the network setup and you're stuck configuring via terminal on a headless box. Fix: connect ethernet to a live switch port BEFORE starting the installer. 10-second cable check saves 30+ minutes of ip/nmcli/netplan debugging.
ZimaOS vs CasaOS
Both made by Icewhale. CasaOS is a lightweight MIT-licensed Docker-app dashboard that runs on top of any Linux distro. ZimaOS is a complete operating system (evolved from CasaOS, bare-metal install, more advanced NAS features, closed source). For DIY-style homelabbers, CasaOS keeps the underlying OS swappable; for appliance-style users, ZimaOS is more polished but locks you into Icewhale's direction.
The Original 80KB Windows Task Manager
Dave Plummer's original Windows Task Manager (1995-ish) was ~80KB — the modern version is ~4MB (50x larger) despite doing largely the same job. Engineering techniques: smart singleton with frozen-instance detection, batch kernel queries, global string cache, lazy loading, diff-before-repaint.
Dave Plummer Credibility Assessment
Dave Plummer is a former Microsoft engineer (1993-2003) whose YouTube channel produces popular content about Windows internals — but his post-Microsoft SoftwareOnline scamware business (Washington AG lawsuit, admitted Consumer Protection Act violations) and disputed technical claims on Twitter warrant skepticism on any non-trivial claim.