TechSkills

Ubuntu-focused knowledge base. Real problems, real fixes, documented as they happen on KpihX-Ubuntu (Ubuntu 25.10).

No theory, no made-up examples. Everything here was lived on my machine and documented after the fact.

🌐 Live Site

• GitHub Pages: https://kpihx.github.io/techskills/

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🧰 Reference

Page	Content
🧰 Tools & Apps	All installed tools — brief description + install command or tutorial link

📚 Tutorials

🖥️ System

Tutorial	Topic
💾 Automount External Disk	Universal "lazy" mount via fstab + x-systemd.automount — mount it when you touch it
🧹 Cleanup Suite	Modular disk cleanup — Snap, cache, Docker, AI models, Work artifacts — 4 risk levels
🐚 Zsh + env	.zshenv/.zprofile/.zshrc triptych, GUI app secret gap, zsh -l -c injection pattern
🗂️ Nautilus Default	Restore GNOME Nautilus as default file manager, purge Nemo
🖥️ ASUS VE228 Stretch Fix	Prevent vertical resolution stretching on Wayland using Tiling Shell
🖼️ Recover deleted images	ext4 undelete runbook — thumbnails, PhotoRec, extundelete
💿 Windows 11 USB Install	Portable SSD install — installer bug + policy block bypass
🍷 Wine	32-bit isolation and HiDPI display for Windows apps
🖥️ tmux	Persistent terminal multiplexer — sessions, sudo gate, auto-notify
🔑 bw-env — Secret Injection	Bitwarden-backed secrets in RAM: unlock, inject, auto-lock on sleep (planned — see TODO.md)

🧑‍💻 Dev

Tutorial	Topic
🐙 GitHub CLI (gh)	Repos, PRs, issues, releases, CI, raw API — all from the terminal
🦊 GitLab CLI (glab)	Repos, MRs, issues, pipelines, CI/CD, secrets — GitLab native CLI
🌐 GitHub Pages + Docsify	Turn a Markdown repo into a Docsify site — local + online, classic vs gh CLI
📦 Node.js & npm prefix	nvm, .nvmrc, and the ~/.npm-global fix for tools that auto-update without nvm sourced
🥟 Bun — JS/TS Runtime	Sovereign JS/TS toolchain — runtime, package manager, test runner, bundler in one binary
📦 fnm — Fast Node Manager	Rust Node version manager — dynamic PATH, --use-on-cd, replaces nvm
📝 Neovim	Daily-driver editor — Lazy.nvim, Mason LSP, Telescope, tmux workflow
☁️ Azure CLI	Deactivated — no subscription; m365 only

🌐 Net

Tutorial	Topic
🔒 Tailscale	MagicDNS permanent fix, SSH config, Bitwarden SSH agent
☁️ Cloudflare CLI (flarectl)	Zone and DNS management from the terminal — CF_API_TOKEN via bw-env
☁️ Cloud hub	Cloud & productivity tool map — skill routing

📱 Apps

Tutorial	Topic
🌊 WaveTerm	Block-based terminal — sidebar widgets, SSH, BYOK AI modes (Groq, Mistral), wsh secrets
🤖 Edge agent CDP setup	Visible Edge profile + MCP bridge for browser automation
📧 m365 CLI — Microsoft 365	Mail, calendar, OneDrive via Graph API — device code auth, personal accounts
🌐 gws CLI — Google Workspace	Gmail, Drive, Calendar, Sheets from the terminal — Discovery-based JSON CLI
🧠 qmd — Local Semantic Search	AI-powered semantic search for your Markdown notes and code
🤖 tg — Telegram CLI	Bot API + Telethon user API — send, read, manage bots and chats (planned — see tools.md for repos)

🔌 MCPs

Tutorial	Topic
🔐 bw-mcp	Bitwarden AI-blind vault proxy — 7-layer security, ACID transactions, WAL
✅ tick-mcp	TickTick MCP — 71 tools, stdio + HTTP transport, V1+V2 API
💬 whats-mcp	WhatsApp MCP — 64 tools, Baileys, dual transport, Telegram admin bridge

🔁 Proxies — the solo successors

MCPs work inside MCP hosts only. The proxies port the same catalogs to plain shell binaries — no MCP runtime, baked-in --help per action, HITL approval on writes, verified destructive calls. For solo (human + script + cron) usage they are strictly more reliable than the MCPs they replace.

Tutorial	Topic
🔁 Proxies	Shared ADN: do/admin, meta+data envelope, HITL, autosave — learn once, drive all seven
🤖 tg-proxy	Telegram Bot API + Telethon user API — 24 actions, folders, webhooks
✅ tick-proxy	TickTick V1+V2 — 52 actions, verified composites around silent API drops
🔒 ts-proxy	Tailscale API — 44 schema-validated actions, payload-driven CLI
📧 mail-proxy	IMAP+SMTP+Zimbra — 37 actions, safety-ladder deletes, send-as aliases
🌐 browser-proxy	Visible Edge automation — 71 actions, daemon + extension bridge
💼 link-proxy	LinkedIn REST v2 — 10 actions, 60-day token ritual
💬 whats-proxy	WhatsApp via Baileys — 68 actions, guarded daemon, receipt honesty

🤖 AI Runtimes

Tutorial	Topic
🤖 OpenCode	Agent runtime + sovereign kernel — 19 plugins, 3 providers, permissions, web stack

🐚 Shell Commands

Tutorial	Topic
awk	Column-aware text processing — field extraction, filtering, arithmetic on streams
sed	Stream editor — in-place substitution, deletion, line selection
grep & regex	Pattern search and regular expressions — universal skill across bash, Python, and more
tail	Live log following and last-N-lines extraction
ps	Process inspection — listing, filtering, reading process state
kill	Signal sending — SIGTERM, SIGKILL, pkill, killall
xargs	Pipe parallelism — turning stdin into command arguments
tee	Stream splitting — simultaneously write to file and stdout
globbing vs regex	Shell glob patterns vs regular expressions — when each applies

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🧰 Reference Environment

• Machine: KpihX-Ubuntu — Ubuntu 25.10
• Shell: Zsh + .kshrc (universal hub for secrets & aliases)
• Secrets: Bitwarden Desktop + bw-env (RAM-injected secrets)
• Network: Tailscale mesh — homelab node kpihx-labs
• Author: KAMDEM Ivann (KpihX / KπX) — École Polytechnique X24