Alex Susanu

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Linkerd - Service Mesh Overview

Kubernetes (mesh) • May 29, 2025

Linkerd is a lightweight, open-source service mesh for Kubernetes that provides runtime debugging, observability, reliability, and security for mic...

linkerdservice-meshkubernetesmicroservicessecurityobservability

Istio - Service Mesh Overview

Kubernetes (mesh) • May 29, 2025

Istio is an open-source service mesh that helps manage service-to-service communication within a Kubernetes cluster (and beyond).

istioservice-meshkubernetesmicroservicessecurityobservability

Docker Orchestration

DevOps (docker) • May 29, 2025

What it is: A tool for defining and running multi-container Docker applications using a YAML file to configure application services, networks, and ...

dockercomposeswarmorchestrationmulti-container

Docker Commands & Troubleshooting

General (docker) • May 29, 2025

Category: DevOps Tags: docker, commands, troubleshooting, debugging, best-practices What Docker CLI provides: The primary interface for managing Do...

Docker Fundamentals

DevOps (docker) • May 29, 2025

What it is: A lightweight, standalone package that includes everything needed to run an application: code, runtime, system tools, libraries, and se...

dockercontainersimagesdockerfileregistry

Docker Networking & Storage

DevOps (docker) • May 29, 2025

What it is: Docker's networking system that allows containers to communicate with each other and the outside world through various network drivers ...

dockernetworkingvolumesstorageportsbind-mounts

Service Mesh / Sidecar Pattern

Architecture (architectural-patterns) • May 29, 2025

A Service Mesh is a dedicated infrastructure layer for managing service-to-service communication in microservices.

service-meshistioenvoysidecarkubernetes

Hexagonal Architecture (Ports & Adapters)

Architecture (architectural-patterns) • May 29, 2025

Hexagonal Architecture, or Ports and Adapters, separates the core logic from the infrastructure, allowing independent evolution of business logic a...

hexagonalclean-architecturejavaports-adapterskubernetes

Domain-Driven Design (DDD)

Architecture (architectural-patterns) • May 29, 2025

Domain-Driven Design (DDD) is an approach to software development that focuses on modeling software based on the business domain, using rich, behav...

dddjavadesignmicroserviceskubernetes

Layered Architecture

Architecture (architectural-patterns) • May 29, 2025

Layered Architecture (also known as n-tier) divides the system into layers with well-defined responsibilities, such as presentation, business, and ...

layeredmvcjavadesign-patternskubernetes

Monolithic Architecture

Architecture (architectural-patterns) • May 29, 2025

A Monolithic Architecture is a single-tiered application structure where all functions—UI, business logic, and data access—are tightly coupled and ...

monolithjavakubernetesdevops

Microservices Architecture

Architecture (architectural-patterns) • May 29, 2025

A Microservices Architecture is a design where an application is composed of small, independent services that communicate over well-defined APIs.

microservicesjavakubernetesspring-bootscalability

CQRS (Command Query Responsibility Segregation)

Architecture (architectural-patterns) • May 29, 2025

CQRS separates the responsibility for reading and writing data into different models, enhancing scalability and performance for complex systems.

cqrsjavaaxoneventsourcingkubernetes

Event-Driven Architecture

Architecture (architectural-patterns) • May 29, 2025

Event-Driven Architecture (EDA) is a design paradigm where components communicate through events—emitted, consumed, and reacted upon—decoupling the...

event-drivenkafkajavakubernetesmicroservices

Serverless Architecture

Architecture (architectural-patterns) • May 29, 2025

Serverless Architecture delegates infrastructure management to the cloud, allowing you to write functions that execute on demand without managing s...

serverlessfaascloudkubernetesjava

Kubernetes Networking

DevOps (k8s) • May 29, 2025

What it is: Stable network endpoint that provides access to a set of pods, with built-in load balancing and service discovery.

kubernetesk8snetworkingserviceingressnetworkpolicydns

CKA Guide: Kubernetes Security - RBAC, ServiceAccounts, SecurityContext & NetworkPolicies

Kubernetes Certification (k8s) • June 02, 2025

Kubernetes Security Layers: The Principle of Least Privilege: Authentication, Authorization, and Admission Control: RBAC Component Model: RBAC Perm...

ckakubernetesexamkubectlcertification

CKAD Essential kubectl Commands Study Guide

Kubernetes (k8s) • May 31, 2025

The foundation of CKAD exam success lies in mastering pod creation, configuration management, and basic troubleshooting.

CKADkubectlKubernetesDevOps

Kubernetes Security: Complete Deep Technical Guide

DevOps (k8s) • May 31, 2025

Kubernetes security is built on multiple layers of defense - no single security mechanism protects everything.

kubernetessecurityrbacpod-securitysecretsadmission-controllersnetwork-policies

CKA Guide: Kubernetes Cluster Components - Control Plane & Worker Node Architecture

Kubernetes Certification (k8s) • June 02, 2025

From Monolithic to Distributed Control Plane: The Microservices Pattern Applied to Infrastructure: The Control Plane as a Control System: State Con...

ckakubernetesexamkubectlcertification

Kubernetes Networking: Complete Deep Technical Guide

DevOps (k8s) • May 31, 2025

Kubernetes networking is fundamentally different from traditional server networking.

kubernetesnetworkingcnipod-networkingcluster-networkingnetwork-policiesingressdns

CKA Study Guide: Kubernetes Cluster Upgrades with kubeadm

Kubernetes Certification (k8s) • June 02, 2025

Upgrading a Kubernetes cluster is fundamentally different from upgrading a monolithic application.

ckakubernetesexamkubectlcertification

CKA Guide: ConfigMaps and Secrets - Application Configuration

Kubernetes Certification (k8s) • June 02, 2025

The Twelve-Factor App Principle: ConfigMaps and Secrets embody the core principle: "Store config in the environment, not in code" The Immutable Inf...

ckakubernetesexamkubectlcertification

Kubernetes Configuration Management: A Deep Dive

Kubernetes Certification (k8s) • June 02, 2025

Before diving into Kubernetes-specific solutions, let's understand the core problem.

ckakubernetesexamkubectlcertification

Multi-Container Pods: Complete Deep Technical Guide

DevOps (k8s) • May 31, 2025

A multi-container pod is a single Kubernetes pod that contains more than one container.

kubernetespodsmulti-containersidecarinit-containersshared-volumesnetworking

CKA Guide: Pod Lifecycle - Creation, Scheduling, Networking, Storage & Logging

Kubernetes Certification (k8s) • June 02, 2025

Pod Design Philosophy: Pod as Shared Execution Environment: Pod Phase Progression: Container State Model within Pods: Complete Pod Anatomy: Init Co...

ckakubernetesexamkubectlcertification

Kubernetes Secrets: Usage and Best Practices

Kubernetes (k8s) • May 29, 2025

Kubernetes Secrets are used to securely store sensitive information like passwords, tokens, and keys, and expose them to containers at runtime.

secretssecuritybase64configenv

CKA Study Guide: RBAC (Role-Based Access Control)

Kubernetes Certification (k8s) • June 02, 2025

Kubernetes is essentially a distributed state management system where the API server is the single source of truth.

ckakubernetesexamkubectlcertification

Kubernetes Services and Networking: Deep Dive

Kubernetes Certification (k8s) • June 02, 2025

1. [The Fundamental Problem: Why Services Exist](#the-fundamental-problem) 2. [Service Types Deep Dive](#service-types) 3. [Ingress Controllers and Ro...

ckakubernetesexamkubectlcertification

Kubernetes Storage: Complete Deep Technical Guide

DevOps (k8s) • May 31, 2025

Kubernetes storage solves the fundamental problem that containers are ephemeral - when a container restarts, all data inside it is lost.

kubernetesstoragepersistent-volumespvcstorage-classesstatefulsetsvolumes

CKA Study Guide: Manifest Management and Common Templating Tools

Kubernetes Certification (k8s) • June 02, 2025

As Kubernetes adoption grows, organizations quickly discover that managing raw YAML manifests becomes unwieldy.

ckakubernetesexamkubectlcertification

Understanding PersistentVolumeClaims (PVC) in Kubernetes

DevOps (k8s) • May 29, 2025

PersistentVolumeClaims (PVCs) are how pods request and use persistent storage in Kubernetes.

kubernetesstoragepvcpersistent-volumescontainers

Multi-Container Pods: A Deep Dive

Kubernetes Certification (k8s) • June 02, 2025

Before diving into patterns, it's crucial to understand why Kubernetes allows multiple containers in a single pod when the general recommendation i...

ckakubernetesexamkubectlcertification

CKAD Exam Tips & Tricks

Kubernetes Certification (k8s) • May 31, 2025

USE WHEN: Question asks for sidecar, logging, or monitoring containers USE WHEN: Question involves configuration data, properties files, or environ...

ckadkubernetesexamkubectlcertification

Understanding `initContainers` in Kubernetes

DevOps (k8s) • May 29, 2025

are a native Kubernetes feature that allow you to run one or more containers before your main application containers start.

kubernetesinitcontainerspodsorchestrationcontainers

Cluster Components - Comprehensive Study Guide

Kubernetes Certification (k8s) • June 02, 2025

Understanding cluster components is understanding how Kubernetes actually works - not just what it does: Control Plane = The brain of Kubernetes (d...

ckakubernetesexamkubectlcertification

Exam Modules

General (k8s) • May 27, 2025

Here are the key modules you should study for the Certified Kubernetes Application Developer (CKAD) exam: Understanding deployment strategies (roll...

CKA Guide: Robust, Self-Healing Application Deployments

Kubernetes Certification (k8s) • June 02, 2025

Fault Tolerance vs Fault Avoidance: The Resilience Engineering Model: The Failure Domain Hierarchy: Blast Radius Minimization: The Chaos Engineerin...

ckakubernetesexamkubectlcertification

Kubernetes Observability & Monitoring: Complete Deep Technical Guide

DevOps (k8s) • May 31, 2025

Observability is the ability to understand what's happening inside your Kubernetes cluster and applications by examining their external outputs.

kubernetesobservabilitymonitoringloggingmetricstracingprometheusgrafanajaeger

Common Kubernetes Errors

General (k8s) • June 01, 2025

Click to read more...

Kubernetes Configuration & Security

DevOps (k8s) • May 29, 2025

What it is: A Kubernetes object that stores non-confidential configuration data in key-value pairs, allowing you to decouple configuration from app...

kubernetesk8sconfigurationconfigmapsecretserviceaccountrbac

CKA Study Guide: Provisioning Infrastructure for Kubernetes

Kubernetes Certification (k8s) • June 02, 2025

Kubernetes doesn't exist in a vacuum - it's a sophisticated orchestration platform that makes specific assumptions about the underlying infrastruct...

ckakubernetesexamkubectlcertification

Security - Comprehensive Study Guide

Kubernetes Certification (k8s) • June 02, 2025

Security in Kubernetes is about controlling access and enforcing boundaries in a shared platform: Identity and Access Management - Who can do what ...

ckakubernetesexamkubectlcertification

YAML Manifests - Comprehensive Study Guide

Kubernetes Certification (k8s) • June 02, 2025

YAML manifests are declarative infrastructure definitions - the DNA of your Kubernetes applications: Desired State Declaration - You describe WHAT ...

ckakubernetesexamkubectlcertification

Kubernetes Annotations – Hidden Power in Metadata

Kubernetes (k8s) • May 31, 2025

Annotations in Kubernetes are key-value pairs that attach arbitrary, non-identifying metadata to objects.

annotationskubernetesobservabilitytoolingDevOpsmetadata

CKA Guide: Deployments, Rolling Updates & Rollbacks

Kubernetes Certification (k8s) • June 02, 2025

Declarative vs Imperative Paradigm: At its core, Kubernetes embraces a declarative model where you describe the desired end state, not the steps to...

ckakubernetesexamkubectlcertification

Pod Lifecycle - Comprehensive Study Guide

Kubernetes Certification (k8s) • June 02, 2025

Understanding pod lifecycle is understanding how Kubernetes actually runs your applications: Atomic Deployment Unit - Pods are the smallest deploya...

ckakubernetesexamkubectlcertification

CKA Study Guide: ClusterIP, NodePort, LoadBalancer Service Types and Endpoints

Kubernetes Certification (k8s) • June 02, 2025

In a world where pods are ephemeral and their IP addresses change constantly, applications need a stable way to communicate with each other.

ckakubernetesexamkubectlcertification

Kubernetes Cluster Internals: Complete Deep Technical Guide

DevOps (k8s) • May 31, 2025

Understanding Kubernetes cluster internals is crucial for troubleshooting, performance optimization, and designing robust systems.

kubernetescluster-internalscontrol-planeapi-serveretcdkubeletschedulercontrollers

Kubernetes Glossary – In-Depth Explanations for CKAD & CKA

General (k8s) • June 03, 2025

--- What: A pod is the smallest deployable unit in Kubernetes.

CKA Study Guide: etcd Backup and Restore

Kubernetes Certification (k8s) • June 02, 2025

etcd is not just another database - it's the single source of truth for your entire Kubernetes cluster.

ckakubernetesexamkubectlcertification

Kubernetes Workload Controllers: Complete Deep Technical Guide

DevOps (k8s) • May 31, 2025

Kubernetes workload controllers are the "managers" that ensure your applications run correctly.

kubernetesdeploymentsstatefulsetsdaemonsetsjobscronjobshpacontrollers

Shared Pod Microservices vs Sidecar Pattern

Kubernetes (k8s) • May 29, 2025

This document explains the difference between running multiple microservices in a single pod (with shared volumes) and using the sidecar pattern.

sidecarmicroservicespod-designkubernetescontainersarchitecture

ConfigMap: Inline vs File-Based Configuration

Kubernetes (k8s) • May 29, 2025

Understanding the difference between defining Kubernetes ConfigMaps inline vs from external files is important for managing application configurati...

configmapyamlvolumeskubectl

CKA Study Guide: Application Scaling in Kubernetes

Kubernetes Certification (k8s) • June 02, 2025

Application scaling in Kubernetes isn't just about handling more traffic—it's about optimizing resource utilization, cost efficiency, and user expe...

ckakubernetesexamkubectlcertification

CKA Study Guide: kubeadm Cluster Installation

Kubernetes Certification (k8s) • June 02, 2025

Before kubeadm, installing Kubernetes was a nightmare of manual configuration, cryptographic complexity, and system administration.

ckakubernetesexamkubectlcertification

CKA Guide: Kubernetes Backup & Restore - etcd Backup, Disaster Recovery & Cluster Management

Kubernetes Certification (k8s) • June 02, 2025

Understanding What Needs Protection: The Recovery Time Hierarchy: etcd as the Source of Truth: etcd Cluster Topology: Basic etcd Snapshot Creation:...

ckakubernetesexamkubectlcertification

Kubernetes Health Probes - Liveness vs Readiness

Kubernetes (k8s) • May 29, 2025

Kubernetes uses health probes to automatically detect when containers are alive and ready to serve traffic.

health-checkslivenessreadinessprobesk8smonitoring

CKA Study Guide: Highly-Available Kubernetes Clusters

Kubernetes Certification (k8s) • June 02, 2025

A basic kubeadm cluster has a critical weakness: if the control plane node fails, the entire cluster becomes unmanageable.

ckakubernetesexamkubectlcertification

CKAD Commands with Explanations

General (k8s) • June 01, 2025

Click to read more...

State Persistence in Kubernetes: A Deep Dive

Kubernetes Certification (k8s) • June 02, 2025

State persistence is one of the most critical aspects of running production workloads in Kubernetes.

ckakubernetesexamkubectlcertification

Core Application Lifecycle Management in Kubernetes: A Deep Dive

General (k8s) • May 27, 2025

Before diving into deployment strategies, it's crucial to understand why Kubernetes was created.

Kubernetes Workloads

DevOps (k8s) • May 29, 2025

What it is: A Kubernetes resource that manages a set of identical pods, providing declarative updates and rollback capabilities for stateless appli...

kubernetesk8sdeploymentreplicasetdaemonsetjobcronjob

Kubernetes Commands & Troubleshooting

DevOps (k8s) • May 29, 2025

What kubectl is: The command-line tool for interacting with Kubernetes clusters, providing a way to deploy applications, inspect and manage cluster...

kubernetesk8skubectltroubleshootingdebuggingmonitoring

CKA Guide: Kubernetes Troubleshooting - Systematic Debugging and Problem Resolution

Kubernetes Certification (k8s) • June 02, 2025

The Scientific Method Applied to Debugging: The Debugging Information Hierarchy: The Dependency Stack: The Five Whys Debugging Framework: API Serve...

ckakubernetesexamkubectlcertification

Kubernetes Configuration Management: Complete Deep Technical Guide

DevOps (k8s) • May 31, 2025

Configuration management in Kubernetes is about separating application code from configuration data.

kubernetesconfigmapssecretsenvironment-variableshelmconfigurationhot-reloading

Kubernetes Storage

DevOps (k8s) • May 29, 2025

What it is: A directory accessible to containers in a pod, providing storage that can persist beyond individual container lifecycles and be shared ...

kubernetesk8sstoragevolumespersistentvolumepvcstorageclass

Backup/Restore - Comprehensive Study Guide

Kubernetes Certification (k8s) • June 02, 2025

Understanding backup/restore is understanding cluster data protection and disaster recovery: etcd Contains Everything - All cluster state, configur...

ckakubernetesexamkubectlcertification

Logging Architecture with Sidecar and Elasticsearch

Kubernetes (k8s) • May 29, 2025

This setup demonstrates how to use a sidecar pattern to collect logs from an application container and forward them to Elasticsearch.

loggingsidecarfluent-bitelasticsearchemptyDirvolumes

CKA Guide: Application Scaling - Manual and Automatic

Kubernetes Certification (k8s) • June 02, 2025

The Scalability Triangle: Horizontal vs Vertical Scaling Mental Models: Kubernetes Philosophy: Embrace Horizontal Scaling Kubernetes is designed ar...

ckakubernetesexamkubectlcertification

Deep Dive: Observability in Container Orchestration

Kubernetes Certification (k8s) • June 02, 2025

Observability is the ability to understand the internal state of a system by examining its external outputs.

ckakubernetesexamkubectlcertification

CKA Guide: Ingress Controllers, CoreDNS, and Advanced Networking

Kubernetes Certification (k8s) • June 02, 2025

The Problem Ingress Solves: The Layer 7 Advantage: The Three-Layer Ingress Model: Ingress Traffic Flow: NGINX Ingress Controller: Traefik Ingress C...

ckakubernetesexamkubectlcertification

Kubernetes Volumes: Mounting ConfigMaps and Secrets

Kubernetes (k8s) • May 29, 2025

Volumes in Kubernetes are used to mount external data (config files, secrets, storage) into pods.

volumesconfigmapsecretmountpods

Pod Design Deep Dive: Labels, Selectors, Annotations & Networking

Kubernetes Certification (k8s) • June 02, 2025

Labels are key-value pairs attached to Kubernetes objects (pods, services, deployments, etc.

ckakubernetesexamkubectlcertification

Kubernetes Services: Deep Technical Explanations with Istio and Helm

DevOps (k8s) • May 31, 2025

Kubernetes Services provide stable network endpoints for accessing pods.

kubernetesservicesnetworkingvirtual-ipendpointsload-balancing

CKA Guide: kubectl Commands & YAML Manifests - Practical Skills Mastery

Kubernetes Certification (k8s) • June 02, 2025

kubectl as the Universal API Client: The Declarative vs Imperative Paradigm: kubectl Command Anatomy: Resource Naming Conventions: Core CRUD Operat...

ckakubernetesexamkubectlcertification

CKAD Commands

General (k8s) • June 01, 2025

Click to read more...

kubectl Commands - Comprehensive Study Guide

Kubernetes Certification (k8s) • June 02, 2025

kubectl is your primary interface to the Kubernetes API server.

ckakubernetesexamkubectlcertification

Kubernetes Core Concepts

DevOps (k8s) • May 29, 2025

What it is: The smallest deployable unit in Kubernetes, containing one or more containers that share storage and network resources.

kubernetesk8scontainersorchestrationcore-concepts

CKAD Essential Tips & Commands

General (k8s) • June 01, 2025

HTTP: 80 HTTPS: 443 SSH: 22 Common app ports: 8080, 3000, 5000 CPU: 1000m = 1 core Memory: 1Gi = 1024Mi Always (default for Deployments) OnFailure ...

Monitoring and Debugging: The System's Nervous System

General (observability) • May 29, 2025

Imagine driving a car with no dashboard - no speedometer, no fuel gauge, no engine temperature warning, no check engine light.

Monitoring and Debugging: The System's Nervous System

General (observability) • May 29, 2025

Monitoring isn't just about knowing when things break—it's about understanding trends, predicting problems, and optimizing performance.

Linux Networking Commands Guide

General (linux) • May 29, 2025

Category: Networking & System Administration Tags: linux, networking, tcp-ip, dns, routing, firewall, diagnostics What this guide covers: Comprehen...

Linux Troubleshooting Guide

General (linux) • May 29, 2025

Category: System Administration & Troubleshooting Tags: linux, troubleshooting, debugging, system-recovery, performance, diagnostics What this guid...

Linux System Administration Commands Guide

General (linux) • May 29, 2025

Category: System Administration & DevOps Tags: linux, system-admin, process-management, file-operations, user-management, monitoring What this guid...

Penetration Testing - Web Application Testing Guide

General (pentesting) • May 29, 2025

Category: Penetration Testing - Phase 2 Tags: oscp, htb, web-application, sql-injection, xss, burpsuite, owasp, file-upload What this phase covers:...

Penetration Testing - Exploitation Frameworks & Manual Exploits Guide

General (pentesting) • May 29, 2025

Category: Penetration Testing - Phase 3 Tags: oscp, htb, metasploit, exploitation, payloads, manual-exploits, buffer-overflow What this phase cover...

Penetration Testing - Reconnaissance & Enumeration Guide

General (pentesting) • May 29, 2025

Category: Penetration Testing - Phase 1 Tags: oscp, htb, reconnaissance, enumeration, nmap, discovery, information-gathering What this phase covers...

Penetration Testing - Post-Exploitation & Privilege Escalation Guide

General (pentesting) • May 29, 2025

Category: Penetration Testing - Phase 4 Tags: oscp, htb, privilege-escalation, post-exploitation, linux-privesc, windows-privesc, persistence What ...

Penetration Testing - Reverse Shells & Payload Generation Guide

General (pentesting) • May 29, 2025

Category: Penetration Testing - Phase 7 Tags: oscp, htb, reverse-shells, payloads, msfvenom, shell-stabilization, persistence, evasion What this ph...

Penetration Testing - Active Directory Attacks Guide

General (pentesting) • May 29, 2025

Category: Penetration Testing - Phase 5 Tags: oscp, htb, active-directory, kerberoasting, bloodhound, golden-ticket, lateral-movement, domain-domin...

Penetration Testing - Network Pivoting & Lateral Movement Guide

General (pentesting) • May 29, 2025

Category: Penetration Testing - Phase 6 Tags: oscp, htb, pivoting, lateral-movement, tunneling, proxychains, port-forwarding, chisel What this phas...

Methodologies & Practices Glossary

General (glossary) • May 28, 2025

What it is: Set of principles and practices for software development that emphasizes collaboration, flexibility, and rapid iteration.

glossarymethodologiesagiledevopspractices

Performance & Optimization Glossary

Programming (glossary) • May 28, 2025

What it is: Temporary storage that saves frequently accessed data for faster retrieval.

glossaryperformanceoptimizationcachingscalability

Development Terms Glossary

Programming (glossary) • May 28, 2025

What it is: A set of rules and protocols that allows different software applications to communicate with each other.

glossarydevelopmentprogrammingterminology

Security Glossary

Security (glossary) • May 28, 2025

What it is: Process of verifying the identity of a user, device, or system trying to access a resource.

glossarysecuritycybersecurityauthenticationencryption

Infrastructure & Networking Glossary

DevOps (glossary) • May 28, 2025

What it is: A computer or software program that provides services, data, or resources to other computers (clients) over a network.

glossaryinfrastructurenetworkingserverscloud

Helm: ConfigMaps and Secrets in Charts

Kubernetes (helm) • May 29, 2025

Helm templates allow you to inject config and secrets using values files and inline templates.

helmconfigmaptemplatingsecretsvalues

Marketing & Sales Vocabulary Guide

Marketing & Sales (vocabulary) • May 29, 2025

Modern marketing approaches leveraging digital channels and data.

marketingsalesdigital-marketingcustomer-acquisitionbranding

Business Strategy & Operations Vocabulary Guide

Business Strategy (vocabulary) • May 29, 2025

Core frameworks and concepts for business strategy development.

strategyoperationsbusinessplanningcompetitive-analysis

Generic Corporate Vocabulary Guide

Business Communication (vocabulary) • May 29, 2025

Essential vocabulary for understanding organizational hierarchy and management concepts.

corporatebusinessterminologycommunication

Finance & Accounting Vocabulary Guide

Finance & Accounting (vocabulary) • May 29, 2025

Core documents and concepts for understanding company financial health.

financeaccountingfinancial-analysisbudgetinginvestment

IT & Software Development Vocabulary Guide

Technology (vocabulary) • May 29, 2025

Understanding the complete process of software creation and maintenance.

ITsoftwaredevelopmenttechnologyprogramming

Docker Best Practices

DevOps (starting-point) • May 27, 2025

Create non-root user in Dockerfile Use USER directive Set proper file permissions Avoid 'latest' tag in production Pin to specific versions Use dig...

dockercontainersdevopssecurity

12-Factor App Methodology Compliance

Architecture (starting-point) • May 29, 2025

The Twelve-Factor App methodology is a set of best practices for building software-as-a-service applications that are portable, scalable, and maint...

cloud-nativemicroservicesdeploymentscalability

Java Spring Boot - Microservices Patterns

Programming (starting-point) • May 27, 2025

Prevents cascading failures in distributed systems States: Closed, Open, Half-Open Implementation: Use Hystrix or Resilience4j Configuration: Failu...

spring bootmicroservicesarchitecturejava

CompTIA Security+ - Network Security

Security (starting-point) • May 27, 2025

ESP (Encapsulating Security Payload) - provides confidentiality AH (Authentication Header) - provides integrity Tunnel mode - entire IP packet encr...

securitynetworkingcomptiavpnfirewalls

Kubernetes Networking Deep Dive

DevOps (starting-point) • May 27, 2025

Each pod gets its own IP address Pods can communicate directly without NAT CNI plugins handle network implementation Flat network space across all ...

kubernetesnetworkingcnicontainers

CompTIA Security+ - Cryptography

Security (starting-point) • May 27, 2025

AES - Advanced Encryption Standard DES - Data Encryption Standard (deprecated) RSA - Most common public key algorithm ECC - Elliptic Curve Cryptogr...

securitycryptographyencryption