Quick reference guides for developers. Every cheatsheet is optimized for A4 printing — save as PDF and keep it handy.

Dense reference card for self-hosting apps on VPS — reverse proxy, containers, SSL, DNS, backups, monitoring, and security hardening.

A dense, no-fluff reference card for Python syntax, builtins, data structures, and patterns — 10 sections, zero padding.

Compact VPS reference card for Linux server setup, SSH, Docker, networking, security, monitoring, deployments, and maintenance on Ubuntu-based VPS environments.

A dense, no-fluff Docker reference covering core concepts, Dockerfile syntax, build/run commands, Compose, volumes, multi-stage builds, and production hardening. One page, everything you need.