Source: https://mayphus.org/ Title: Mayphus --- type: project --- Source: https://mayphus.org/ Title: Mayphus I work across Linux, CI/CD, and hardware—finding which layer failed, fixing it, and writing down how to recover. ## About I'm Mayphus Tang, based in Hangzhou. Since 2018 I've repaired cameras and recorders, run servers and office networks, and spent three years at State Street tracing why CI/CD releases failed. I still like small boards, networks, and cameras that refuse to boot. Most typing and implementation goes through AI coding tools now; I keep the goals, the checks, and the decision to ship. This site is my public notebook—evidence, limits, and links included. Questions welcome from people or their agents; say who you represent and keep it relevant. Oct 28, 2026 · IPv4 vs IPv6: three days of measuring my home link to an overseas server https://mayphus.org/ipv4-vs-ipv6/ Oct 26, 2026 · The Tailscale subnet route that was approved but inaccessible https://mayphus.org/tailscale-subnet-route-acl/ Oct 21, 2026 · A silent Roku remote, and a bug in my diagnostic https://mayphus.org/roku-voice-investigation/ Oct 9, 2026 · Content-first design https://mayphus.org/content-first-design/ Oct 9, 2026 · From hands-on operations to AI-assisted systems engineering https://mayphus.org/ai-assisted-systems-engineering/ Oct 8, 2026 · Reconstructing an unattended Ubuntu install from local media https://mayphus.org/local-media-ubuntu-install/ Oct 8, 2026 · A smaller USB boot probe https://mayphus.org/notes/local-media-ubuntu-usb-boot-probe/ Oct 8, 2026 · An older laptop as a phone-directed workspace https://mayphus.org/older-desktop-phone-workspace/ Oct 8, 2026 · Understanding computer systems https://mayphus.org/understanding-computer-systems/ Oct 7, 2026 · A local Android preview for my GoSure 3201 https://mayphus.org/entries/gosure-3201-local-android-preview/ Oct 7, 2026 · Building a Responses gateway with explicit limits https://mayphus.org/entries/opencode-responses-gateway/ Oct 7, 2026 · From a U-Boot prompt to FreeBSD in RAM https://mayphus.org/entries/nanopi-r2s-freebsd-ram-boot/ Oct 6, 2026 · Above Qingshui Gong https://mayphus.org/xiamen-qingshui-gong-flight/ Oct 5, 2026 · GPT-124M from scratch: benchmarking and restart recovery https://mayphus.org/gpt124m-restartable-training/ Oct 5, 2026 · Making a four-province expressway atlas lighter https://mayphus.org/four-province-expressway-atlas/ Oct 1, 2026 · An experimental FreeBSD USB Ethernet workaround for the NanoPi R2S https://mayphus.org/nanopi-r2s-freebsd-usb-ethernet/ Aug 15, 2026 · Twelve volts, one wrong pin https://mayphus.org/entries/twelve-volts-one-wrong-pin/ Aug 14, 2026 · OpenLens: a local-first camera that admits what it does not know https://mayphus.org/openlens/ Aug 13, 2026 · A TinyStories model on my RP2040 board https://mayphus.org/tinystories-rp2040/ Aug 10, 2026 · The old depth camera was not dead https://mayphus.org/entries/old-depth-camera-was-not-dead/ Aug 1, 2026 · AI-centered robot stack https://mayphus.org/notes/ai-centered-robot-stack/ Jul 26, 2026 · website as working memory https://mayphus.org/notes/website-as-working-memory/ Jul 17, 2026 · optimizing someone elses workflow https://mayphus.org/notes/optimizing-someone-elses-workflow/ Jul 16, 2026 · How I work with AI https://mayphus.org/ai-workflow/ Jul 16, 2026 · A Roku remote through Tailscale https://mayphus.org/roku-remote-over-tailscale/ Jul 15, 2026 · faster codex workflow https://mayphus.org/notes/faster-codex-workflow/ Jul 14, 2026 · concrete before abstraction https://mayphus.org/notes/concrete-before-abstraction/ Jul 12, 2026 · ai super app https://mayphus.org/notes/ai-super-app/ Jul 12, 2026 · one public thread https://mayphus.org/notes/one-public-thread/ Jul 11, 2026 · proof before claims https://mayphus.org/notes/proof-before-claims/ Jul 10, 2026 · restartable work https://mayphus.org/notes/restartable-work/ Jul 1, 2026 · Today's realization: I'm not at my best when answering from memory. https://mayphus.org/notes/x-2072198325340873068/ Jun 28, 2026 · I don’t remember the commands anymore. https://mayphus.org/notes/x-2070904771448631393/ Apr 24, 2026 · I just used my Emacs to check my homelab computer k3s's service when I am out of home. https://mayphus.org/notes/x-2047688708418425261/ Sep 17, 2025 · Fixing custom configuration in weapp-vite https://mayphus.org/notes/weapp-vite-custom-config/ Dec 31, 2024 · Booting my new Raspberry Pi Zero 2 W. What should I make? #raspberrypizero #diy #rpizero https://mayphus.org/notes/youtube-Xxb1FfHzyvk/ Dec 25, 2024 · I tear down my electric cervical neck massager #teardown #massager #diy https://mayphus.org/notes/youtube-Rz1yJOCcIoo/ Dec 12, 2024 · Repair my stuck MacBook key, easy but need practice and patience #macrepair #techrepair #diy https://mayphus.org/notes/youtube-EX4-KdCL83s/ Nov 28, 2024 · My DIY page turner. https://mayphus.org/notes/x-1862113064197276142/ Nov 14, 2024 · 3d print a Batman https://mayphus.org/notes/x-1857059847453265988/ Aug 23, 2024 · A tiny FreeBSD jail doc fix https://mayphus.org/a-tiny-freebsd-jail-doc-fix/ Jul 14, 2024 · My first PCB. https://mayphus.org/entries/x-1881704765983510867/ Mar 27, 2024 · I love Emacs org-mode to take notes. https://mayphus.org/notes/x-1772974412708388979/ Feb 23, 2023 · Early Bing Chat and ChatGPT experiments https://mayphus.org/notes/early-bing-chat-and-chatgpt/ Jul 13, 2017 · Working like a professional in an abandoned office at university, trying to learn ROS. https://mayphus.org/entries/learning-ros-office/ May 26, 2017 · At university, I helped others get this linear actuator moving. https://mayphus.org/notes/university-linear-actuator/ Nov 10, 2016 · These photos are from a mechanical competition in November 2016. https://mayphus.org/entries/mechanical-competition/ Oct 14, 2016 · My first time using an AT89X51 microcontroller. https://mayphus.org/notes/first-at89x51/ · 3 TP-Link Security Cameras https://mayphus.org/tp-link-security-camera-investigation/ · AI-native website interfaces https://mayphus.org/ai-native-website-interfaces/ · Alpine Builder https://mayphus.org/alpine-builder/ · Books https://mayphus.org/books/ · Boot evidence and recovery planning https://mayphus.org/systems-hardware-boot/ · Cell Field https://mayphus.org/cell-field/ · Electronic Learning Book Repair https://mayphus.org/electronic-learning-book-repair/ · FreeBSD https://mayphus.org/freebsd/ · Geologic Clock https://mayphus.org/geologic-clock/ · Gulangyu Tile Patterns https://mayphus.org/gulangyu-tile-patterns/ · Honglou https://mayphus.org/honglou/ · How a computer reads a handwritten digit https://mayphus.org/digit-recognition/ · Infrastructure https://mayphus.org/infrastructure/ · Input Foundry https://mayphus.org/typing/ · IPA Chart https://mayphus.org/ipa/ · Linux — files, users and permissions https://mayphus.org/systems-linux-files/ · Linux — networking and packages https://mayphus.org/systems-linux-networking/ · Linux — processes, services and logs https://mayphus.org/systems-linux-processes/ · Linux Disk Layout https://mayphus.org/linux-disk/ · Motif https://mayphus.org/motif/ · Neon Harbor — Fly & Drive https://mayphus.org/fly/ · Operating a small service through change https://mayphus.org/operating-small-services/ · Paths, filesystems and storage devices https://mayphus.org/systems-storage/ · Polychron https://mayphus.org/polychron/ · Reading a FreeBSD system before changing it https://mayphus.org/systems-freebsd-base/ · Résumé Builder https://mayphus.org/resume-builder/ · Starflash https://mayphus.org/starflash/ · Systems learning starts with an observation https://mayphus.org/systems-observation/ · Understanding a FreeBSD jail's boundaries https://mayphus.org/systems-freebsd-jails/ · Unix Timeline https://mayphus.org/unix-timeline/ · World History Chart https://mayphus.org/history/