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Free IT Cheat Sheets

Download 41 professional quick reference guides — free PDF downloads for Linux, Docker, Git, Python, and more.

41 Cheat Sheets
2 Downloads
100% Free
All Sheets Quick Reference Beginner's Guides Intermediate Guides Advanced Guides
All DEVOPS & INFRASTRUCTURE (16) Linux (13) DATABASES (9) Programming Languages (8) Docker (8) Kubernetes (7) JavaScript (4) PostgreSQL (4) Python (4) PowerShell (3) Azure (Microsoft Azure) (3) SSH & Remote Access (3) AWS (Amazon Web Services) (3) MySQL (3) Bash / Shell (3) NETWORKING & SECURITY (3) Linux Servers (3) Automation (3) CLOUD COMPUTING (2) PROGRAMMING & DEVELOPMENT (2) TypeScript (2) PHP (2) Linux Administration (2) Java (2) Linux Security (2) Web Development (2) Linux Networking (1) Windows (1)
Linux Networking PDF

Networking Cheat Sheet

TCP/IP, ports, and network troubleshooting reference. Covers common ports, network commands, troubleshooting tools, ipta

1 downloads Free Download
PDF

Nginx Configuration Cheat Sheet

Essential directives for web server setup. Covers service management, server blocks, location blocks, SSL/TLS, reverse p

1 downloads Free Download
Kubernetes PDF

Helm Quick Reference

A 1-page quick reference for Helm: chart management (install, upgrade, rollback), repository commands, template renderin

0 downloads Free Download
JavaScript PDF

JavaScript Quick Reference

A 1-page quick reference covering essential JavaScript syntax: variables, types, arrays, functions, destructuring, promi

0 downloads Free Download
TypeScript PDF

TypeScript Quick Reference

A 1-page quick reference for TypeScript type annotations: basic types, interfaces, type aliases, generics, utility types

0 downloads Free Download
JavaScript PDF

Node.js Quick Reference

A 1-page quick reference for Node.js APIs: file system (fs), path module, HTTP/Express patterns, process management, eve

0 downloads Free Download
Java PDF

Java Quick Reference

A 1-page quick reference for core Java: data types, collections (List, Map, Set), OOP patterns, streams, lambdas, record

0 downloads Free Download
Programming Languages PDF

Go (Golang) Quick Reference

A 1-page quick reference for Go: variables, types, functions, error handling, structs, interfaces, goroutines, channels,

0 downloads Free Download
Programming Languages PDF

Rust Quick Reference

A 1-page quick reference for Rust: ownership, borrowing, lifetimes, structs, enums, pattern matching, traits, error hand

0 downloads Free Download
Programming Languages PDF

C/C++ Quick Reference

A 1-page quick reference covering C fundamentals (pointers, structs, preprocessor) and modern C++ (auto, smart pointers,

0 downloads Free Download
PHP PDF

PHP Quick Reference

A 1-page quick reference for PHP: variables, types, string functions, array functions (map, filter, reduce), OOP, traits

0 downloads Free Download
Programming Languages PDF

Ruby Quick Reference

A 1-page quick reference for Ruby: variables, collections (arrays, hashes), classes, modules, blocks, procs, lambdas, it

0 downloads Free Download
Web Development PDF

HTML & CSS Quick Reference

A 1-page quick reference for HTML5 semantic elements, CSS Flexbox, CSS Grid, custom properties, media queries, container

0 downloads Free Download
DATABASES PDF

SQL Quick Reference

A 1-page quick reference for standard SQL: SELECT queries, JOINs (INNER, LEFT, RIGHT, FULL), aggregation (COUNT, SUM, AV

0 downloads Free Download
DATABASES PDF

MongoDB Quick Reference

A 1-page quick reference for MongoDB: CRUD operations, query operators ($gt, $in, $regex, $or), update operators ($set,

0 downloads Free Download
DATABASES PDF

Redis Quick Reference

A 1-page quick reference for Redis: strings, lists, sets, sorted sets, hashes, key management, TTL, SCAN, and common pat

0 downloads Free Download
Linux Servers PDF

Apache HTTP Server Cheat Sheet

A 1-page quick reference for Apache HTTP Server: virtual hosts, SSL/TLS configuration, mod_rewrite rules, reverse proxy,

0 downloads Free Download
Linux Administration PDF

Systemd & Journalctl Cheat Sheet

A 1-page quick reference for systemd: service management, unit file structure, journalctl log queries, targets, timers,

0 downloads Free Download
DEVOPS & INFRASTRUCTURE PDF

GitHub Actions Cheat Sheet

A 1-page quick reference for GitHub Actions CI/CD: workflow structure, triggers, steps, actions, secrets, matrix strateg

0 downloads Free Download
DEVOPS & INFRASTRUCTURE PDF

Jenkins Quick Reference

A 1-page quick reference for Jenkins Pipeline: declarative syntax, stages, steps, flow control, environment variables, c

0 downloads Free Download
DATABASES PDF

Elasticsearch Quick Reference

A 1-page quick reference for Elasticsearch: index operations, document CRUD, search queries (match, term, bool, range),

0 downloads Free Download
DEVOPS & INFRASTRUCTURE PDF

Kafka Quick Reference

A 1-page quick reference for Apache Kafka: topic management, producer commands, consumer commands with groups, offset ma

0 downloads Free Download
DEVOPS & INFRASTRUCTURE PDF

Terraform Syntax Cheat Sheet

Infrastructure as Code quick reference. Covers CLI commands, configuration blocks, variables, outputs, expressions, and

0 downloads Free Download
Linux PDF

Linux File Permissions Cheat Sheet

Complete guide to Unix file permission system. Covers permission basics, groups, numeric/symbolic modes, ownership, spec

0 downloads Free Download
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Why Use Our Cheat Sheets?

Professional quick reference guides designed for IT professionals and learners.

📄 Print-Ready PDFs

Compact 1-2 page format perfect for printing and pinning near your workstation.

🎨 Professional Design

Dark theme with orange accents, clear typography, and organized command reference layout.

📚 Linked to eBooks

Each cheat sheet links to related eBooks for deeper learning on the topic.

🔒 100% Free

All cheat sheets are free to download. No hidden costs, no premium tier.

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Frequently Asked Questions

What are Dargslan IT cheat sheets?

Dargslan IT cheat sheets are free, professionally designed PDF reference guides in four tiers: Quick Reference (1-2 pages), Beginner's Guides (3-6 pages), Intermediate Guides (5-10 pages), and Advanced Guides (8-15 pages with expert-level content, architecture patterns, and production strategies).

How many cheat sheets are available?

We currently offer 121 free cheat sheets covering topics like Linux, Docker, Kubernetes, Git, Python, PostgreSQL, PowerShell, and more across four skill levels. New cheat sheets are added regularly.

Are the cheat sheets really free?

Yes, all cheat sheets are completely free to download. We just ask for your email address so we can notify you when new cheat sheets are released.

What is the difference between the four tiers?

Quick Reference sheets are compact 1-2 page PDFs for printing. Beginner's Guides are 3-6 pages for learning from scratch. Intermediate Guides are 5-10 pages with best practices for experienced users. Advanced Guides are 8-15 pages covering expert topics, production architecture, performance tuning, and real-world strategies.

Can I print the cheat sheets?

Absolutely! All PDFs are designed to look great both on screen and when printed. Quick Reference sheets are especially good for printing and keeping near your desk.

How do I download a cheat sheet?

Click on any cheat sheet to view its details, then click the download button. Enter your email address and the PDF will be available for immediate download.