Fixing incidents is table stakes. What separates good engineers from exceptional ones is what happens after – the blameless postmortem. Learn why writing them well is one of the most underrated habits in infrastructure engineering, and how to do it properly.

A practical DevOps walkthrough on how to safely capture JVM heap dumps and thread dumps during a CPU spike on a Java Spring/Tomcat production server — using a shell script built around jmap, jstack, and jcmd.

Resolving an OpenLDAP service failure on a VM snapshot — fixing hostname identity mismatches, loopback address issues, olcServerID with CRC32 recalculation, and removing leftover replication config from the source server.

Run Pi-hole and Unbound on a Raspberry Pi 4 to block ads and tracking domains across every device on your home network, while resolving DNS privately using a local recursive resolver — no third-party DNS provider required.

An internal LDAP certificate renewal failed due to incorrect SELinux contexts on transferred certificate files. Despite correct permissions and ownership, OpenLDAP couldn't initialise TLS. Using restorecon to fix the security context resolved the issue immediately, highlighting the importance of SELinux context verification in certificate deployments.

This article demonstrates how to implement Full (Strict) SSL/TLS encryption by combining Cloudflare's managed frontend certificates with Let's Encrypt wildcard certificates on your origin server.

How we migrated our production care management platform from ANS to Cloudflare Load Balancer — eliminating manual SSL certificate management that had caused a past outage, replacing an EOL HAProxy instance, and achieving zero downtime through a dummy hostname pre-configuration strategy and a planned 45-minute DNS cutover window.

This case study demonstrates how we implemented HTTP/2 on production Apache servers with zero downtime using a blue-green deployment strategy.

This guide demonstrates how to set up secure TLS 1.3 communication using Ed25519 elliptic curve certificates and a private Certificate Authority (CA). It covers encrypted client-server communication with modern, efficient cryptographic standards — ideal for internal systems, microservices, and zero-trust network architectures.

Learn how to set up MySQL user accounts with role-based access profiles, secure configurations, and consistent privilege management across environments.