Cheat sheets & reference docs styled with design systems
52 guides · 44 styles · Self-contained HTML
Split your terminal into sessions, windows, and panes. Run persistent processes that survive disconnects, script complex layouts, and manage remote workflows.
ReferenceAnthropic's AI coding agent for the terminal. Natural language commands, multi-file editing, MCP integrations, persistent memory, and autonomous subagents.
ReferenceGitHub's AI-powered terminal assistant. Natural language to shell commands, slash-driven workflows, multi-model support, and MCP tool integrations.
ReferenceOpenAI's open-source terminal coding agent. Sandboxed execution, multi-provider model support, full-auto mode, and customizable profiles.
ReferenceThe distributed version control system behind modern software development. Branching strategies, rebasing workflows, interactive staging, hooks, and collaboration patterns.
ReferencePackage applications into portable, isolated containers. Build images with Dockerfiles, orchestrate services with Compose, and manage networking and volumes.
ReferenceOrchestrate containers at scale across clusters. Deploy workloads, expose services, manage secrets and configs, and master kubectl for day-to-day operations.
ReferenceThe modal text editor that rewards mastery. Lightning-fast cursor motions, composable editing commands, powerful macros, LSP integration, and Lua-based configuration.
ReferenceThe extensible, self-documenting editor — keybindings, Org mode, Elisp, Magit, and the multiplexer dream.
GuideCommand center comparison of Kitty, WezTerm, Alacritty, Windows Terminal, iTerm2, Ghostty, xterm.js, and classic terminals. Features, performance, configuration, and choosing your battle station.
GuideAndroid terminal emulator — Linux forged in mobile steel. Package management, dev environments, PTY allocation, and the tools that finally work on Android.
ReferenceThe Model Context Protocol for connecting AI to external tools, data, and capabilities. Covers tools, resources, prompts, transports, building servers and clients, and real-world patterns.
GuideComplete beginner’s guide from Windows to WSL2, Claude Code, and Codex CLI. Line endings, shell setup, CLI power tools, and everything that trips up new developers.
GuideManage context as a finite resource for AI coding agents. CLAUDE.md hierarchies, modular architecture, multi-tool configs, progressive disclosure, anti-patterns, and memory systems.
The Swiss Army knife of audio & video. Convert formats, encode with H.264/H.265/VP9/AV1, build filtergraphs, stream HLS/DASH, accelerate with GPU, and inspect media with ffprobe.
ReferenceEncrypted remote access to any machine. Generate and manage keys, tunnel through firewalls, proxy via jump hosts, multiplex connections, and harden your config.
ReferenceCommand-line HTTP powerhouses for working with APIs and the web. Send requests, handle auth, submit forms, download files, and automate web interactions.
ReferenceHigh-power tools for HTML. AJAX requests from attributes, swap strategies, triggers, SSE, WebSockets, boosting, OOB swaps, and server integration patterns.
ReferenceNode.js package management from install to publish. Dependency resolution, lock files, workspace monorepos, lifecycle scripts, and security auditing.
LanguageThe language of the web, fully typed. Type system, async patterns, modules (ESM/CJS), generics, DOM & Node.js APIs, decorators, testing with Vitest, and common gotchas that trip up every developer.
LanguageThe Python developer's complete toolkit. Virtual environments, package management with pip and uv, project config with pyproject.toml, debugging, and profiling.
LanguageRuby programming from core syntax to Rails 8 essentials. Object model, blocks, metaprogramming, gems, testing with RSpec, and the Hotwire stack for modern web apps.
LanguageThe language built for simplicity and concurrency. Goroutines, channels, interfaces, generics, error handling, modules, testing, the standard library, and the Go ecosystem.
LanguageOwnership, borrowing, traits, async/await, cargo, and the Rust ecosystem.
LanguageNo hidden control flow, no hidden allocations. Comptime generics, explicit allocators, C interop, cross-compilation, and a build system written in Zig itself.
LanguageModern markup and styling from semantic structure to scroll-driven animations. Flexbox, Grid, container queries, :has(), custom properties, view transitions, and performance.
LanguageThe enterprise workhorse from fundamentals to modern Java 21+. OOP, collections, streams, concurrency, virtual threads, Spring Boot, Maven/Gradle, testing, and the full ecosystem.
LanguageFunctional, concurrent, and fault-tolerant. Pattern matching, pipes, OTP supervisors, Phoenix, LiveView, Ecto, ExUnit testing, and deploying releases to production.
LanguageA friendly language for building type-safe systems on Erlang and JavaScript. Custom types, pattern matching, the pipe operator, Result-based error handling, OTP actors, and the Hex package ecosystem.
ReferenceMicrosoft's extensible code editor used by millions. Multi-cursor editing, integrated debugging, built-in terminal, remote development, and a vast extension ecosystem.
ReferenceThe universal pattern-matching language for text. Character classes, quantifiers, capture groups, lookaround assertions, and flavor differences across languages.
ReferenceWrite robust shell scripts for automation and system tasks. Variables, control flow, functions, I/O redirection, signal traps, and text processing with sed and awk.
ReferenceThe object-oriented shell from Windows PowerShell 5.1 to cross-platform pwsh 7+. Cmdlets, pipelines, modules, remoting, error handling, and a Bash-to-PowerShell rosetta stone.
ReferenceA lightweight command-line JSON processor. Filter, slice, map, and transform structured data using a concise, pipe-friendly query language.
GuideDesigning precise, well-organized HTTP interfaces. REST constraints, URL design, HTTP methods, status codes, authentication, pagination, error handling, and versioning best practices.
GuideA meta-level language selection guide for the AI agentic coding era. Decision matrices, language profiles, project-type flowcharts, and the five axes that matter when AI writes most of the code.
ReferenceThe build automation workhorse. Targets, prerequisites, recipes, variables, pattern rules, functions, conditionals, and battle-tested patterns for C, Go, and Docker projects.
ReferenceThe open-source game engine, fully decoded. GDScript, scenes & nodes, physics, 2D/3D development, shaders, animation, audio, UI, export targets, plus AI integration with MCP servers and local LLMs.
High-performance web server, reverse proxy, and load balancer. Virtual hosts, SSL/TLS termination, upstream configuration, caching strategies, and request routing.
ReferenceRelational database essentials for both major engines. Query writing, join strategies, index design, JSON support, window functions, CTEs, and administration.
ReferenceThe in-memory data engine. Data structures, key expiration, Pub/Sub, transactions, Lua scripting, persistence, caching patterns, streams, consumer groups, Cluster, and Sentinel.
ReferenceThe embedded database engine. CLI commands, type affinity, PRAGMAs, WAL mode, FTS5, JSON functions, window functions, CTEs, and embedding patterns for Python, Node, Go, and Rust.
ReferenceThe fast in-process analytical database. SQL extensions, Parquet/CSV/JSON import, window functions, QUALIFY, WASM browser usage, Python & Node.js bindings, httpfs remote data, and comparison with SQLite.
ReferenceThe modern testing framework for Vite. Test/describe/expect API, vi.mock and vi.fn, snapshots, coverage, workspace mode, browser mode, fixtures, and migration from Jest.
ReferenceThe all-in-one JavaScript runtime. Installation, bun run/install/test/build, Bun.serve() HTTP server, SQLite bindings, file I/O, macros, Node.js compatibility, and bunx.
ReferenceLinux's init system and service manager. Write unit files, create timers, query logs with journalctl, manage targets, configure cgroups, and enable socket activation.
ReferenceAgentless IT automation that manages infrastructure as code. Inventory, playbooks, roles, Jinja2 templates, Vault secrets, and idempotent fleet management.
GuideAn opinionated conceptual guide to modern software architecture. Patterns, scale tiers, modular design, frontend and backend landscapes, data strategy, infrastructure, security, and AI context engineering.
GuideAWS, Azure, and GCP compared side-by-side. Compute, storage, databases, networking, security, AI/ML, IaC, observability, pricing models, architecture patterns, and a decision framework.
GuideAutomate builds, tests, and deployments at velocity. GitHub Actions, GitLab CI, Jenkins pipelines, Docker in CI, deployment strategies, secrets management, and pipeline optimization.
ReferenceThe complete GitHub Actions reference. Workflow YAML syntax, triggers, runners, matrix builds, reusable workflows, caching, artifacts, environment protection rules, marketplace actions, and debugging.
ReferenceInfrastructure as Code with HashiCorp’s declarative language. HCL fundamentals, providers, state management, modules, workspaces, advanced patterns, testing, and production best practices.
GuideThe OSI/TCP-IP stack, IP addressing & subnetting, DNS resolution, core protocols, routing & switching, firewalls, VPNs, load balancing, and a complete troubleshooting toolkit.
GuideThe three pillars of observability: metrics, logs, and traces. Prometheus, Grafana, OpenTelemetry, alerting, SLOs, error budgets, incident response, and the complete tool ecosystem.
GuideThe essential security desk reference. CIA triad, authentication, cryptography, OWASP Top 10, network defense, cloud security, incident response, and compliance frameworks for government IT.
GuideThe gold standard of software development. Code quality, testing disciplines, architecture, operational excellence, DORA metrics, engineering culture, and the practices that separate good teams from great ones.
GuideThe art of running reliable systems. SRE principles, observability, incident management, postmortems, on-call, release engineering, disaster recovery, automation, SLOs, and building an ops culture.
GuideX.509 structure, certificate authorities, TLS handshake, mTLS, certificate formats, Let's Encrypt & ACME, enterprise & government PKI, HSMs, code signing, and troubleshooting.
GuideThe complete identity governance reference. AD architecture, LDAP, Kerberos, SAML, OAuth, RBAC, Group Policy, Azure AD / Entra ID, SSO federation, security hardening, and troubleshooting.
GuideA comprehensive comparison of Linux distros. Debian, Red Hat, Arch, and SUSE families, package managers, release models, desktop environments, immutable distros, WSL2, and a decision framework.
GuideThe definitive compliance reference for government enterprise IT. NIST CSF 2.0, 800-53 control families, RMF process, FedRAMP authorization, FISMA, STIGs, CIS Benchmarks, ATO lifecycle, vulnerability management, and DevSecOps compliance.
GuideThe complete IT rationalization playbook. Portfolio discovery, the TIME model, Gartner 6Rs, TCO analysis, dependency mapping, decommissioning runbooks, data retention compliance, stakeholder management, and continuous portfolio governance.
ReferenceFull-duplex real-time communication. The protocol handshake, browser API, server implementations in Node/Python/Go, reconnection strategies, binary data, authentication patterns, scaling with Redis pub/sub, and SSE comparison.
ReferenceThe complete GraphQL reference. Schema definition, resolvers, queries, mutations, subscriptions, authentication patterns, cursor-based pagination, client libraries (Apollo, urql), introspection, federation, and tooling.