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Development tutorial - IT technology blog

Implementing ABAC with Open Policy Agent (OPA) and Node.js for Complex Microservices Systems

By admin July 17, 2026

When RBAC is no longer sufficient for complex authorization logic in Microservices, Open Policy Agent (OPA) and the ABAC model offer a practical solution. This post shares production experience with Node.js, Rego policies, and how to integrate OPA into Express middleware.

Python

Building a Telegram Bot with Python and python-telegram-bot: Receive Notifications and Control Your Server Remotely

By admin July 17, 2026

A step-by-step guide to building a Telegram Bot with Python and python-telegram-bot v20+ for remote server monitoring and control. Covers command handling, inline confirmation keyboards, proactive alerts from cron jobs, and running the bot as a systemd service.

Artificial Intelligence tutorial - IT technology blog

How to Install and Use OpenHands: The AI Agent for Automated Coding on Linux

By admin July 17, 2026

A step-by-step guide to installing and using OpenHands (OpenDevin) on Linux to automate code writing, bug fixing, and programming task execution via Docker and LLM.

Network

Goodbye Excel: How to Install phpIPAM for Professional IP Infrastructure Management

By admin July 17, 2026

It's time to ditch error-prone Excel files for IP management. This guide shows how to install phpIPAM on Ubuntu to manage subnets, VLANs, and automate IP scanning.

Docker

Build Your Own Local AI Chatbot: Deploying Ollama and Open WebUI with Docker Compose

By admin July 17, 2026

Learn how to build a private, high-security AI chatbot. Detailed guide on deploying Ollama and Open WebUI with Docker Compose, optimizing GPUs for full offline operation.

Docker

nsenter: The Network Debugging “Lifesaver” for Lightweight Docker Containers (Distroless/Alpine)

By admin July 17, 2026

Stop rebuilding Docker images just to install curl or ping. Use nsenter to directly access the Network Namespace and debug like a pro.

Docker

Docker Volume & NFS: The ‘Lifesaver’ Solution for Multi-Host Data

By admin July 17, 2026

A guide on configuring Docker Volumes with the NFS Driver for multi-host data sharing. A simple, effective solution for Docker Swarm and High Availability.

Docker

Colima Guide: A Smooth Docker Desktop Alternative, a ‘Lifesaver’ for RAM on macOS

By admin July 17, 2026

Don't let Docker Desktop hog all your RAM. Learn how to switch to Colima: a lightweight, free Docker Engine alternative perfectly optimized for macOS M1/M2/M3.

Ubuntu

How to Install OpenLDAP on Ubuntu 22.04: Manage 1,000+ Users Centrally

By admin July 17, 2026

Managing hundreds of users across multiple servers has never been easier. This Ubuntu 22.04 OpenLDAP guide helps you build a DevOps-standard centralized authentication system.

Network

Mastering Your Local Network with NetAlertX: Say Goodbye to Wi-Fi ‘Leechers’ and IP Conflicts

By admin July 17, 2026

NetAlertX is a powerful LAN monitoring tool that helps detect unknown devices and sends instant Telegram alerts. Check out this detailed Docker setup guide.