Cheatnotes for Dummies is an open-source collection of easy-to-understand cheat sheets for cybersecurity, ethical hacking, Linux, networking, SQL, programming, web development, and developer tools. Designed for beginners, students, researchers, and professionals who want fast command references, practical examples, and simplified technical notes.

Stored SQL injection, also known as second-order SQL injection, is a vulnerability where a malicious payload is saved by an application in its database and later executed when that data is retrieved and used in a different query.

JavaScript SQL Injection Security Analysis: Mapping Vulnerable Functions, Injection Points, Automated Detection Tools, and Defense-in-Depth Mitigation Strategies for Modern Web Applications

Comprehensive SQLite cheatsheet covering database management, CRUD, indexes, joins, transactions, FTS5, JSON, date functions, PRAGMA settings, performance tuning, and command-line tools. Includes 21 sections with syntax examples, best practices, and quick reference for beginners to advanced users.

Comprehensive Elasticsearch cheatsheet covering everything from basic concepts, CRUD operations, and query DSL to aggregations, mappings, performance tuning, security, and monitoring. Includes practical examples for indexing, searching, filtering, bulk operations, reindexing, and cluster health management.

Comprehensive Redis cheatsheet covering all data types (Strings, Lists, Sets, Hashes, Sorted Sets, Streams), commands, transactions, Lua scripting, Pub/Sub, replication, clustering, persistence, security, monitoring, and optimization. Perfect for developers and DB admins seeking a complete quick-reference guide.

Comprehensive MS SQL Server cheatsheet covering queries, joins, aggregations, CTEs, indexes, DDL/DML, transactions, stored procedures, functions, triggers, error handling, dynamic SQL, and performance tuning. Includes syntax examples, data types, constraints, and system functions.

Comprehensive Oracle Database cheatsheet covering connections, security, DDL/DML, queries, functions, PL/SQL, procedures, triggers, indexes, performance, backup, and data dictionary views. Includes syntax examples and quick references for developers and DBAs.

Complete MongoDB cheatsheet covering databases, collections, CRUD operations, query/update operators, aggregation pipeline, indexing, data types, performance tuning, and best practices. Includes practical examples for both beginners and advanced developers working with MongoDB.

Comprehensive PostgreSQL cheatsheet covering installation, connections, databases, tables, data types, CRUD, constraints, indexes, queries, joins, aggregations, CTEs, views, functions, triggers, transactions, users, backup/restore, performance tuning, monitoring, JSONB, full-text search, partitioning, system tables & more.