Install Jenkins on Ubuntu: CI/CD Server Setup Guide
Install Jenkins LTS on Ubuntu, put it behind Nginx with HTTPS, secure it, create a pipeline with a Jenkinsfile, add agents and back it up.
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DevOps
Docker, Kubernetes, CI/CD, Git and automation for deploying and running software on servers.
Git LFS: Version Large Files Without Bloating Your Repository
Version large files with Git LFS: install, track patterns, migrate existing history, LFS on Gitea and GitLab servers, storage and bandwidth, and pitfalls.
Docker Multi-Stage Builds: Smaller Images, Faster Deploys
Use Docker multi-stage builds to compile in one stage and ship a slim runtime image, with examples for Node.js, Go, Python and static sites.
Woodpecker CI: Open-Source CI/CD for Gitea and Forgejo
Self-host Woodpecker CI with Docker Compose: connect Gitea or Forgejo, server and agent, .woodpecker pipelines, secrets, image builds, deploys.
Use SSH Keys with GitHub (and Deploy Keys on Servers)
Set up SSH authentication for GitHub: generate a key, add it to your account, test it, use several accounts, and give servers read-only deploy keys.
Dockerize a Python App (Django, Flask or FastAPI)
A production Dockerfile for Django, Flask or FastAPI: slim image, dependency caching, non-root user, Gunicorn or Uvicorn, static files, Compose.
Docker Compose Tutorial: Multi-Container Apps in One File
Learn Docker Compose by building a real stack: services, ports, volumes, networks, env files, health checks and the commands you use every day.
Self-Hosted GitHub Actions Runner on a VPS: Setup and Security
Run GitHub Actions jobs on your own VPS: install the runner as a service, labels, Docker access, cleanup, ephemeral runners, and private-repo-only security.
k3s: Lightweight Kubernetes on a VPS in Minutes
Install k3s on a VPS: single and multi-node clusters, the built-in Traefik ingress, persistent storage, TLS with cert-manager and upgrades.
Infrastructure as Code: A Practical Introduction
What infrastructure as code means, declarative vs imperative tools, Terraform, Ansible, cloud-init and Compose in practice, and how to start.
Zero-Downtime Deployments for Node.js Apps on a VPS
Deploy Node.js without dropped requests: graceful shutdown, PM2 cluster reloads, release directories, health checks and safe migrations.
HashiCorp Nomad: A Simpler Orchestrator Than Kubernetes
Run containers and binaries with HashiCorp Nomad: architecture, a dev agent, Docker job files, rolling updates, clusters, licensing, when it fits.
GitOps with Argo CD: Deploy to Kubernetes from Git
Install Argo CD on Kubernetes or k3s, connect a Git repository, create Applications with auto-sync and self-heal, use Helm and manage secrets.
Harden Linux Servers With Ansible: A Reusable Playbook
Automate baseline security for Ubuntu and Debian servers with Ansible: admin user and keys, sshd, UFW, Fail2ban, auto updates, sysctl, safe rollout.
MicroK8s on Ubuntu: Lightweight Kubernetes With Add-ons
Install MicroK8s on an Ubuntu VPS: snap install, kubectl, DNS, ingress, storage, cert-manager and metrics add-ons, joining nodes for HA, ports, and vs k3s.
Podman vs Docker: Differences and Which to Use on Servers
Podman vs Docker: daemonless and rootless design, CLI compatibility, Compose support, systemd and Quadlet, pods, security and when to choose each.
Install Rancher to Manage Kubernetes Clusters With a Web UI
Set up Rancher on a VPS: requirements, install on k3s with Helm and cert-manager, the bootstrap password, importing or creating clusters, RBAC, and backups.
Docker Environment Variables: -e, --env-file and Compose
Pass environment variables to containers with -e, --env-file and Compose; .env interpolation vs env_file, precedence, ARG vs ENV, secrets.
cert-manager on Kubernetes: Free Let's Encrypt TLS Certificates
Automate HTTPS in Kubernetes with cert-manager: Helm install, Let's Encrypt staging and prod ClusterIssuers, HTTP-01 vs DNS-01, Ingress annotations, fixes.
How to Get a Docker Container's IP Address (and Why Not To)
Find a Docker container's IP with docker inspect, list IPs of all containers, understand per-network addresses, and why service names beat hard-coded IPs.
Ansible Inventory Guide: Hosts, Groups and Variables
Organise servers in Ansible inventories: INI and YAML formats, groups and children, host and group variables, patterns and dynamic inventories.
k9s: Manage Kubernetes From a Fast Terminal UI
Manage Kubernetes from the terminal with k9s: install, navigate resources, filter, view logs, shell into pods, port-forward, scaling, read-only mode.
Caddy with Docker Compose: The Simplest HTTPS Reverse Proxy
Use Caddy in Docker as a reverse proxy: automatic Let's Encrypt certificates, a two-line Caddyfile per app, shared networks, auth and reloads.