k3s is a lightweight, certified Kubernetes distribution designed for resource-constrained environments, edge computing, IoT devices, and development workstations. Created by Rancher (now SUSE), k3s packages the entire Kubernetes control plane into a single binary under 100 MB, removing cloud-provider integrations, storage drivers, and alpha features that are not needed in most deployments. k3s uses SQLite […]
Kubernetes is the industry-standard container orchestration platform for automating deployment, scaling, and management of containerised applications across clusters of servers. While Kubernetes is typically set up using managed services (EKS, GKE, AKS) in cloud environments, installing it with kubeadm on bare-metal or on-premises servers provides full control over the cluster configuration. kubeadm is the official […]
How to Harden Active Directory Against Pass-the-Hash on Windows Server 2012 R2 Pass-the-Hash (PtH) is an attack technique in which an adversary captures an NTLM credential hash from one system and uses it to authenticate to other systems without knowing the actual password. Because NTLM hashes are reusable, a single compromised credential can lead to […]
How to Set Up Windows Event Forwarding (WEF) on Windows Server 2012 R2 Windows Event Forwarding (WEF) is a native Windows mechanism that allows you to centralize security events from dozens or hundreds of servers onto a dedicated collector server—without deploying an agent or purchasing additional software. WEF uses the WS-Management protocol (the same protocol […]
Portainer is a lightweight, web-based Docker management UI that makes container management accessible without needing the Docker CLI. It provides a graphical interface for managing containers, images, volumes, networks, Docker Compose stacks, and container registries. Portainer Community Edition (CE) is open-source and supports Docker standalone, Docker Swarm, and Kubernetes environments. It is particularly valuable for […]
Docker Compose transforms multi-container application deployment from a series of manual docker run commands into a declarative, version-controlled configuration. A production-ready Compose deployment includes health checks (to ensure services are truly ready before dependent services start), resource limits (to prevent runaway containers from consuming all host resources), restart policies (to automatically recover from failures), and […]
Efficient Docker image and container management is fundamental to maintaining a healthy container environment. Docker images accumulate on hosts — old base images, build cache layers, and unused intermediate images can consume tens of gigabytes of disk space if not managed regularly. Understanding the Docker image layer model is key: images consist of read-only layers […]
Ruby on Rails (Rails) is a full-stack web application framework built on Ruby that made convention-over-configuration and the MVC pattern mainstream in web development. Rails provides ActiveRecord (ORM), ActionController (routing and controllers), ActionView (templating with ERB/Haml), ActionMailer, ActiveJob (background jobs), ActionCable (WebSockets), and a comprehensive set of security defaults out of the box. A Rails […]
Ruby is a dynamic, object-oriented programming language best known as the language behind Ruby on Rails, the influential web framework that popularised convention-over-configuration and RESTful web applications. rbenv is the standard Ruby version manager for production servers — it allows installing and switching between multiple Ruby versions per user or per directory, without requiring root […]
Rust is a systems programming language focused on memory safety, performance, and concurrency. Rust achieves memory safety without a garbage collector through its ownership and borrowing system, which enforces at compile time that there are no dangling pointers, buffer overflows, or data races. This makes Rust suitable for building high-performance systems software where both safety […]
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