devops Archives - Page 4 of 28

Linux Privilege Escalation: From Initial Foothold to Root Access

May 26, 2026

Is your Linux server one misconfig away from a total breach? Learn how attackers exploit SUID bits and sudoers files, and how to use tools like LinPEAS and Auditd to stop them.

DevOps

Stop Paying for PagerDuty: How to Self-Host Grafana OnCall on a $5 VPS

May 26, 2026

Ditch the expensive SaaS fees. This guide shows you how to deploy Grafana OnCall using Docker Compose to create a robust, self-hosted incident response system.

DevOps

Docker Multi-stage Build and Distroless Images: Shrink Your Container to Just a Few MB

May 25, 2026

Learn how to use Docker multi-stage builds and distroless base images to shrink your container from 1 GB down to just a few MB — with real Dockerfile examples for Go, Node.js, Python, and Java. Includes security hardening tips and CVE reduction techniques for production deployments.

Linux

Stop Hardcoding SMTP: Set Up a Postfix Mail Relay for Linux Alerts

May 25, 2026

Learn how to configure Postfix as a send-only mail relay on Linux. This guide covers installation, security hardening, and address rewriting to ensure your system alerts and Cron jobs deliver emails reliably.

Networking

Stop Sending Users Across the Globe: Building GeoDNS with PowerDNS

May 25, 2026

Stop wasting milliseconds. Learn how to build a self-hosted GeoDNS using PowerDNS to route global traffic to the nearest server for maximum performance.

Programming

Stop Writing API Clients by Hand: A Guide to OpenAPI Generator

May 25, 2026

Eliminate manual API updates and type mismatches. Learn how to use openapi-generator to automate Client SDKs and Server Stubs directly from your OpenAPI spec.

DevOps

Service Discovery and Dynamic Configuration with HashiCorp Consul

May 25, 2026

Learn how to eliminate hardcoded IP addresses and manage microservices effectively using HashiCorp Consul for Service Discovery and Dynamic Configuration.

Database

Scaling Database Performance: A Practical Guide to Read Replicas in PostgreSQL and MySQL

May 24, 2026

Is your database hitting 100% CPU? This guide shows you how to implement Read Replicas in PostgreSQL and MySQL to offload traffic and keep your app fast.

DevOps

Ditch the Cloud: Self-Hosting a Lean DevOps Stack with Gitea and Actions

May 24, 2026

Take control of your DevOps data. This guide shows you how to deploy a high-performance Gitea instance and Gitea Actions runner using Docker Compose for private, low-cost CI/CD.

Linux

Mastering Linux initramfs: Custom Drivers and Boot Scripts

May 23, 2026

Don't let boot errors stop you. Learn how to inject drivers, kernel modules, and custom scripts into the Linux initramfs for both Debian and RHEL systems.