Practical guides on databases, Linux, and infrastructure — sorted newest first.
Recognize misleading scales, aggregations, missing context, and panel semantics before acting on an operational dashboard.
Interpret percentiles, variance, and standard deviation correctly when analyzing latency, workload, and database performance.
Build a PostgreSQL and MySQL monitoring stack with useful metrics, alerts, and daily DBA workflows.
Understand what Cloudflare provides for free, what Workers are, and when a paid plan becomes worthwhile.
Use percentiles, histograms, segmentation, and error rates to find incidents hidden by healthy-looking averages.
Create a Telegram bot and send practical server and monitoring alerts with curl and a reusable Bash script.
A DBA-oriented guide to DynamoDB workload fit, data modeling, capacity, topology, monitoring, and recovery.
A focused home-server stack with Nextcloud, DNS filtering, secure remote access, monitoring, and backups.
Translate recovery objectives into concrete database architecture, backup, and testing decisions.
Turn database backups into a recovery process you can trust during an incident.
Use a repeatable exploratory workflow to understand infrastructure metrics before creating dashboards, thresholds, or alerts.
Install Proxmox VE, update the host, and create your first virtual machine in a practical home lab.
Turn structured application and database logs into reliable operational metrics, investigations, and alerts.
Limit database exposure with security zones, explicit traffic flows, and layered controls.
Build a usable response plan with clear roles, severity levels, playbooks, communications, and exercises.
Contain the incident, preserve evidence, determine scope, and rebuild safely.
Turn technical findings into owned, prioritized, and reviewable cybersecurity risks.
Use a private WireGuard network and hardened SSH configuration for remote administration.
Map common adversary objectives to practical defensive controls and detection opportunities.
Detect unusual production behavior with robust statistics while preserving the anomalies that may represent real incidents.
Validate freshness, completeness, uniqueness, units, and collection behavior before making operational decisions from a dashboard.
Compare pg_upgrade, dump and restore, logical replication, and pgloader to choose the right migration strategy.
Virtually synchronous replication, quorum, conflict handling, state transfers, and health-aware routing.
Topology discovery and controlled MySQL recovery with candidate selection, fencing, routing, and operational safeguards.
Blue-green gives you an instant, reversible traffic switch. Canary lets you validate changes under real traffic before full rollout.
Configure MySQL connection management, topology monitoring, and workload-specific query routing safely.
Step-by-step guide to configuring MySQL primary-replica replication — binary logs, GTID, and verifying the replica is healthy.
The InnoDB Doublewrite Buffer is the silent guardian of MySQL's data integrity. It protects against torn pages and corruption during crashes.
tcpdump is the command-line Swiss Army knife for network traffic — fast, lightweight, and ideal for servers. Learn how to install and use it effectively.
Install and use Wireshark for capturing and analyzing network traffic. Covers display filters, stream following, statistics, and production tips.
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