September 10, 2026
12 min read
Set Up Free SSL with Let's Encrypt and Certbot
Set up free SSL with Let's Encrypt and Certbot on Ubuntu Apache or Nginx, automate renewal, and fix the DNS and firewall issues that break HTTPS in production.
September 10, 2026
13 min read
Deployments vs StatefulSets vs DaemonSets
Deployments vs StatefulSets vs DaemonSets compared with YAML examples, decision criteria, and production patterns for stateless apps, databases, and node agents.
September 10, 2026
11 min read
Multi-Cluster Kubernetes Across Clouds
Multi-Cluster Kubernetes Across Clouds lets you run workloads on AWS, GCP, and Azure while keeping one control plane for GitOps, policy, and disaster recovery.
September 10, 2026
12 min read
Ansible Interview Questions and Answers
Ansible interview questions and answers for DevOps roles, covering architecture, playbooks, modules, inventory, Vault, and real production scenarios from 2026 hiring panels.
September 08, 2026
12 min read
PHP FFI for Calling C Libraries
PHP FFI for Calling C Libraries lets PHP 8.3+ load shared objects and call C functions directly—without writing a PECL extension.
September 12, 2026
12 min read
HMAC Explained: Message Authentication
HMAC Explained: Message Authentication shows how keyed hashes prove message integrity and sender identity for webhooks, APIs, and payment callbacks.
