Articles

19 entries match these filters

• 0247 Build a Proxmox VE home lab: from bare metal to your first restored backup Install Proxmox VE on one spare machine, switch to the free update repository, create a VM and an LXC container, then schedule… Beginner · Tutorial · Linux Article Backup & restore · Installation & first steps · VMs & containers 15 Oct 2026
• 0248 Run your first KVM virtual machine with libvirt and virt-install Turn a Linux desktop or server into a KVM host: check CPU support, install libvirt, use the default NAT network, create a… Beginner · Tutorial · Linux Article Basics 15 Oct 2026
• 0249 Set up and harden a fresh Linux server in one afternoon Take a new Ubuntu, Debian or Rocky/Alma server from first login to a safer baseline: sudo admin, SSH keys only, firewall, automatic… Beginner · Tutorial · Linux Article Networking & firewalls · Packages & updates · Users, sudo & hardening 15 Oct 2026
• 0250 Containerize a Node.js app and run it with PostgreSQL using Docker Compose Package a small Node.js web app in a multi-stage Docker image, then run it next to PostgreSQL with Docker Compose, named volumes,… Intermediate · Tutorial · Linux, macOS, Windows Article Docker basics · Docker Compose · PostgreSQL 15 Oct 2026
• 0251 Learn Kubernetes on your laptop with kind: from first cluster to Ingress Build a throwaway Kubernetes cluster in Docker with kind, deploy a web app with config, secrets and probes, scale it, roll out… Beginner · Tutorial · Linux, macOS, Windows Article Concepts · Workloads & services 15 Oct 2026
• 0252 Package a web app as a Helm chart: create, test, install, upgrade and roll back Turn a small nginx web app into your own Helm chart, check it with lint and template, install it into a namespace,… Intermediate · Tutorial · Any system Article Helm 15 Oct 2026
• 0253 Take an app to production on OpenShift: S2I build, TLS Route, storage, autoscaling and network policy Build a small Python app from Git with Source-to-Image on OpenShift or OKD, then add an HTTPS Route, config and secrets, storage,… Intermediate · Tutorial · Linux, macOS, Windows Article Concepts · Deploying applications 15 Oct 2026
• 0254 Automate three servers with Ansible: roles, templates, Vault and safe dry runs Build a real Ansible project for two web servers and one database server: inventory groups, SSH keys, roles, templates, handlers, an encrypted… Intermediate · Tutorial · Linux, macOS Article Ansible · Keys & config 15 Oct 2026
• 0255 Build a monitoring stack with Prometheus, node_exporter and Grafana on one Linux server Install Prometheus and node_exporter as systemd services, scrape and query host metrics with PromQL, then add Grafana with a dashboard and an… Intermediate · Tutorial · Linux Article Prometheus & Grafana · Services & systemd 15 Oct 2026
• 0256 Manage infrastructure as code with Terraform: from first file to plans on pull requests Learn the full Terraform workflow without a cloud account: variables, a module, outputs, state, plan, apply and destroy, a backend for shared… Beginner · Tutorial · Linux, macOS, Windows Article GitHub Actions · Terraform 15 Oct 2026
• 0257 Run PostgreSQL properly on a Linux server: install, lock down, back up, monitor and patch Set up PostgreSQL 18 from the official repository for one application: a dedicated role and database, SCRAM logins from one app server… Intermediate · Tutorial · Linux Article Backup & restore · Install & connect · Roles & administration 15 Oct 2026
• 0258 Build a MySQL 8.4 source-replica pair with GTIDs and rehearse a manual failover Set up GTID replication between two MySQL 8.4 servers, provision the replica with the clone plugin, then stop the source, promote the… Advanced · Tutorial · Linux Article Administration · Replication 15 Oct 2026
• 0259 Speed up a slow database query with a Redis cache: cache-aside in Python, measured and locked down Put Redis in front of a slow query in a small Python app: cache-aside reads, TTLs with jitter, invalidation on writes, an… Intermediate · Tutorial · Linux Article Administration & persistence · Basics 15 Oct 2026
• 0260 Design and build a library database in SQLite: tables, keys, joins, reports and backups Model books, members and loans, create tables with keys and constraints, load sample data, write join and aggregate reports, add indexes checked… Beginner · Tutorial · Any system Article Joins · Queries 15 Oct 2026
• 0261 Build a Python command-line to-do app: from empty folder to installable command Create a small to-do tool in Python with argparse and JSON storage, test it with pytest and package it with pyproject.toml so… Beginner · Tutorial · Any system Article Environments & packages · Files & automation · Testing 15 Oct 2026
• 0262 Make your first pull request: Git and GitHub from first commit to merged change A complete beginner's path through Git and GitHub: set up Git, make commits, ignore files, use branches, push to GitHub, open a… Beginner · Tutorial · Any system Article Branching & rebasing · Pull requests · Setup 15 Oct 2026
• 0263 Build a notes REST API with plain Node.js: CRUD, validation, status codes and CORS Write a small JSON API for notes using only Node.js built-ins: create, read, update and delete, input validation, correct HTTP status codes,… Intermediate · Tutorial · Any system Article Making requests · Node.js · Status codes 15 Oct 2026
• 0264 Build an accessible, responsive event page: semantic HTML, Grid and a form with clear errors Build a one-page event site from scratch with semantic HTML, a mobile-first Flexbox and Grid layout, an accessible sign-up form with error… Beginner · Tutorial · Browser Article Accessibility · Layout 15 Oct 2026
• 0265 Turn a one-liner into a robust bash script: strict mode, options, logging, traps, locking and a schedule Grow a find-and-gzip one-liner step by step into a dependable bash script with strict mode, getopts, usage text, logging, error traps, dry-run,… Intermediate · Tutorial · Linux, macOS Article Services & systemd · Shell scripting 15 Oct 2026