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Transparent Linux Bridge Firewall with nftables: Network Control Without Changing IPs or Topology

By admin July 16, 2026

A transparent firewall using Linux bridge and nftables lets you control all network traffic without changing IP addresses or the existing topology. The ideal solution when you need to add security to a production system without causing downtime or reconfiguring any running servers.

Docker

Dockerize Elixir Phoenix: Multi-stage Build, OTP Releases, and Production-Ready Erlang Clustering

By admin July 16, 2026

A detailed guide to Dockerizing Elixir Phoenix with an optimized multi-stage build that reduces image size from 1.2GB to 85MB, production-ready OTP Releases configuration, and automatic Erlang clustering via libcluster DNS in Docker Compose. Includes a real-world Dockerfile, clustering configuration, and a deploy script with safe database migrations.

Monitoring

Grafana Faro: The ‘Watchful Eye’ for Real User Monitoring (RUM) in Web Applications

By admin July 16, 2026

Grafana Faro is a powerful RUM solution for tracking real user experiences. Detailed setup guide to detect frontend errors and optimize website performance.

Centos

Installing GitLab CE on CentOS Stream 9: Building Your Own Internal Code and CI/CD Forge

By admin July 16, 2026

Properly install GitLab CE on CentOS Stream 9. Detailed instructions from hardware configuration and SELinux security to free Let's Encrypt SSL setup.

Fedora

Mastering PHP 8.x on Fedora Server: Optimizing PHP-FPM and Taming SELinux

By admin July 16, 2026

A guide to setting up high-performance PHP 8.x on Fedora Server. Optimize PHP-FPM Unix Sockets, configure OPcache, and professionally handle SELinux for Production environments.

Monitoring

Prometheus Alertmanager Silences and Inhibition Rules: Reducing Alert Noise in Production Systems

By admin July 15, 2026

A guide to configuring Alertmanager Silences and Inhibition Rules to reduce alert noise in production environments. Covers integrating amtool into a CI/CD pipeline and setting up inhibition rules for Kubernetes clusters.

Python

Building a Web Dashboard with NiceGUI: Real-time UI Entirely in Python

By admin July 15, 2026

After 6 months running NiceGUI in production for an internal server monitoring dashboard, I'm sharing the full setup from scratch to deployment — real-time UI with WebSocket, charts, tables, and form validation, all in Python. Not a single line of JavaScript required.

VMware

Configuring Private VLAN (PVLAN) on VMware vSphere: Network Traffic Isolation for VMs on the Same Subnet

By admin July 15, 2026

Private VLAN (PVLAN) on VMware vSphere lets you isolate traffic between virtual machines on the same subnet without creating additional VLANs or changing any IP configuration. This guide covers the full setup: declaring Primary/Secondary VLANs on a Distributed Switch, creating Port Groups, assigning VMs, and verifying isolation with ping and PowerCLI.

Git

Resolving Git Conflicts the Easy Way with Meld: A Complete Mergetool Configuration Guide

By admin July 15, 2026

Don't let Git conflicts slow you down. This step-by-step guide covers how to install and use Meld as your mergetool for a more visual, safe, and professional way to resolve code conflicts.

Artificial Intelligence tutorial - IT technology blog

Building a ‘Self-Service’ PostgreSQL AI Agent with PandasAI: From 1 Hour to 1 Minute

By admin July 15, 2026

Don't let SQL waste your time. Discover how to combine PandasAI and PostgreSQL to build an automated data analysis system, reducing your daily reporting workload by 70%.