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GNU GROUP KNOWLEDGE HUB

One engineering graph. Multiple ways to go deeper.

Search across what we teach, what we help architect and troubleshoot, representative engineering scenarios, practical articles and reusable production resources.

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ArticleAutomotive & AAOS

AAOS Architecture Fundamentals

A systems-level view of Android Automotive OS, vehicle integration and the engineering boundaries that matter.

ResourceAutomotive & AAOS

AAOS Platform Readiness Checklist

A compact review checklist for AAOS platform integration, diagnostics, security and production readiness.

TrainingAI Engineering

AI Engineering

Move beyond AI demos into engineered systems: machine-learning fundamentals, LLM applications, retrieval, agents, evaluation, observability, security and production deployment.

ConsultingAI Engineering

AI Engineering

Move AI, LLM, RAG and agentic applications from prototype behavior toward measurable, secure and operable production systems.

TrainingAutomotive & AAOS

Android Automotive OS (AAOS)

Understand Android Automotive as a vehicle platform: architecture, services, vehicle integration, HAL/VHAL, security, diagnostics and engineering workflows.

ArticleData Engineering

Apache Spark for Production Data Engineering

A practical engineering guide to Spark architecture, PySpark pipelines, partitioning, performance, streaming and production operations.

ResourceData Engineering

Apache Spark Production Readiness Checklist

A compact review checklist for Spark and PySpark workloads before they become production data pipelines.

ConsultingDevOps & Platform Engineering

Architecture & Technical Advisory

Independent engineering guidance for organizations making architecture, platform, modernization or technology-selection decisions across connected systems.

Case StudyDevOps & Platform Engineering

Assessing Kubernetes production readiness

A representative architecture-review scenario for a Kubernetes platform that works functionally but needs stronger production resilience, security and operability.

ConsultingAutomotive & AAOS

Automotive & AAOS

Architecture, integration and troubleshooting support for Android Automotive OS and connected vehicle-platform engineering.

ConsultingCloud & Architecture

Cloud & Platform Architecture

Architecture and modernization guidance for cloud infrastructure, platform services, networking, observability and workload migration.

TrainingData Engineering

Data Engineering & Big Data

Understand distributed data systems and build practical batch, streaming and lakehouse pipelines with production-oriented performance and operability.

ConsultingData Engineering

Data Engineering & Big Data

Architect, modernize and troubleshoot distributed data platforms spanning Apache Spark, Kafka, Trino, orchestration and lakehouse technologies.

ResourceData Engineering

Data Platform Architecture Review Checklist

A practical checklist for reviewing batch, streaming, Spark, Kafka, lakehouse and distributed-SQL architectures.

TrainingDevOps & Platform Engineering

DevOps & Platform Engineering

Connect source control, CI/CD, infrastructure automation, containers, Kubernetes and observability into a coherent engineering delivery system.

ConsultingDevOps & Platform Engineering

DevOps & Platform Engineering

Improve software delivery and platform engineering by connecting CI/CD, automation, containerization, Kubernetes and observability into an operable system.

Case StudyAutomotive & AAOS

Diagnosing an AAOS / VHAL integration boundary

A representative automotive-platform scenario where application, Car Service, VHAL and vehicle integration boundaries need to be understood systematically.

ArticleEmbedded Systems

Embedded Linux Production Basics

A practical introduction to the layers that turn Linux into a reliable embedded platform.

ConsultingEmbedded Systems

Embedded Systems

Engineering support for embedded Linux platforms, BSP and device integration, system interfaces, performance and low-level troubleshooting.

TrainingEmbedded Systems

Embedded Systems Engineering

Connect software to hardware behavior through embedded C/C++, Embedded Linux, BSP concepts, drivers, interfaces, debugging and product-level engineering practices.

Case StudySecurity

Hardening a Linux production baseline

A representative security-review scenario for a Linux estate that needs a consistent, explainable hardening baseline without breaking operational requirements.

ArticleDevOps & Platform Engineering

Kubernetes Production Architecture: From Cluster to Platform

A practical reference for designing Kubernetes as an operable production platform rather than a collection of nodes.

ResourceDevOps & Platform Engineering

Kubernetes Production Readiness Checklist

A compact field checklist for reviewing a Kubernetes platform before production workloads depend on it.

ConsultingLinux & Open Source

Linux & Open Infrastructure

Design, review and troubleshoot Linux and open infrastructure with emphasis on reliability, security, performance and operational clarity.

TrainingLinux & Open Source

Linux & Open Source Engineering

Build a durable Linux mental model, then progress into administration, networking, security, performance, troubleshooting and production operations.

ResourceAI Engineering

Linux Incident Command Sheet

A concise first-response command reference for Linux availability and performance incidents.

ArticleAI Engineering

Linux Performance Troubleshooting: A Layered Method

A practical workflow for moving from symptoms to evidence across CPU, memory, storage, network and application layers.

ResourceSecurity

Linux Security Review Checklist

A practical first-pass checklist for reviewing Linux hosts used in production services.

ArticleData Engineering

Modern Data Platforms: Batch, Streaming and the Lakehouse

How Spark, Kafka, Trino, Airflow and open table formats can fit together in a modern data-engineering platform.

TrainingProgramming & Systems

Programming & Systems Engineering

Develop programming skill with an engineering focus: data structures, memory, concurrency, networking, APIs, debugging and system-level behavior.

ArticleAI Engineering

RAG in Production: Retrieval Is an Engineering System

Why production RAG depends on ingestion, chunking, retrieval, evaluation, security and observability—not only an LLM prompt.

Case StudyData Engineering

Recovering a slow Spark data pipeline

A representative performance-engineering scenario for a Spark/PySpark workload that becomes slower and less predictable as data volume and transformation complexity grow.

TrainingSecurity

Security Engineering

Build security understanding across Linux, networks, applications, DevSecOps, containers, Kubernetes and AI systems with practical engineering controls.

ConsultingAI Engineering

Security Engineering

Engineering-focused security assessment and hardening across Linux, delivery pipelines, containers, Kubernetes, applications, APIs and AI systems.

ArticleSecurity

Security Engineering: Defense in Depth

A practical way to reason about security across hosts, networks, applications, containers and delivery pipelines.

Case StudyDevOps & Platform Engineering

Strengthening security inside a CI/CD pipeline

A representative DevSecOps scenario for a delivery pipeline that needs security controls without turning every build into an unmanageable collection of scanners.

Case StudyAI Engineering

Taking a RAG system from demo to production

A representative AI-engineering scenario for a RAG prototype that produces promising demos but lacks measurable retrieval quality, evaluation and production controls.