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Monitoring tutorial - IT technology blog

VictoriaMetrics Installation Guide: A Prometheus Alternative Saving 90% Disk Space

By admin April 10, 2026

A detailed guide on installing VictoriaMetrics as a Prometheus alternative. Save 90% disk space, reduce RAM usage, and boost query speeds for large-scale monitoring systems.

Python

Mastering unittest.mock: Don’t Let ‘Dead’ APIs Break Your Unit Tests

By admin April 10, 2026

Discover the power of unittest.mock in Python. Learn to mock APIs, databases, and handle system errors to make your Unit Tests faster, more stable, and professional.

Database

Replacing RabbitMQ with Redis Streams: Building a ‘Lightweight yet Powerful’ Message Queue for Real-time Systems

By admin April 10, 2026

Redis Streams is the ideal RabbitMQ alternative for small to medium projects. Learn to build a reliable Message Queue with Consumer Groups and ACK for smooth real-time event processing.

Security

Mastering SOPS for Secret Encryption: Stop API Key Leaks on Git

By admin April 10, 2026

Stop leaking API keys on Git! Here is a detailed guide on using Mozilla SOPS to encrypt secrets in YAML/JSON files with PGP. The ultimate security solution for Devs and DevOps.

Virtualization

Proxmox HA: The Ultimate System Rescue at 2 AM Without Leaving Your Bed

By admin April 10, 2026

A hands-on guide to configuring Proxmox VE Cluster and High Availability (HA). This solution enables automatic VM recovery during physical server failures, ensuring maximum uptime for businesses.

VMware

Mastering VMware Backup and Restore: Better Safe Than Sorry

By admin April 10, 2026

Learn how to build a robust 3-2-1 VMware backup strategy. This guide clarifies the difference between Snapshots and Backups, and covers using Veeam and GhettoVCB for total data protection.

Linux

Escape ‘Dependency Hell’ on Linux with Nix: The Package Manager That Saved Me at 2 AM

By admin April 10, 2026

Nix Package Manager is a lifesaver for isolating software, supporting instant rollbacks, and completely eliminating library conflict errors on Linux. This guide provides practical installation and usage tips for DevOps and Sysadmins.

Docker

Docker Compose Watch: A Game-Changer for a Seamless Docker Development Experience

By admin April 10, 2026

Docker Compose Watch automatically syncs code to containers the moment you save. Learn how to skip manual image builds and make Docker development as smooth as running locally.

Fedora

Managing Multiple Node.js, PHP, and MariaDB Versions: Fedora’s DNF Modularity “Secret Weapon”

By admin April 10, 2026

Forget nvm or unofficial repos. With DNF Modularity on Fedora, switching between Node.js 18, 20 or PHP 7.4, 8.2 is simpler and safer than ever.

Fedora

Building Personal Fedora Repos with Copr: No More Manual ‘make install’!

By admin April 10, 2026

Learn how to use Copr to build and manage your personal Fedora Repository. A detailed guide from RPM packaging to automatic updates via DNF for developers.

Biome: Say Goodbye to the ESLint and Prettier ‘Maze’ to Speed Up Your Projects by 25x

Optimize Proxmox VE in 5 Minutes with Helper Scripts: Remove Subscription Nag and Configure Standard Repos

Automating Ubuntu Server Hardening to CIS Benchmarks Standards with USG

Why I Ditched Requests for Httpx: A Guide to Async HTTP Client and HTTP/2 for Python

Mount and Edit qcow2, vmdk Files Directly on Linux Using NBD: Fast, Simple, No VM Boot Required

Mastering Type Checking in Python with Mypy: Stop TypeErrors Before Deployment

Installing SoftEther VPN on Linux: A Powerful ‘All-in-One’ VPN Solution

Professional NVIDIA GPU Monitoring with Prometheus & DCGM Exporter: Don’t wait for a ‘burnout’ to fix it

Circuit Breaker in Node.js with Opossum: Don’t Let One Failing Service Bring Down the Whole System

Using Vision LLM to Convert Architecture Diagrams to Terraform: From Sketch to Source Code in 30 Seconds

VictoriaMetrics Installation Guide: A Prometheus Alternative Saving 90% Disk Space

Mastering unittest.mock: Don’t Let ‘Dead’ APIs Break Your Unit Tests

Replacing RabbitMQ with Redis Streams: Building a ‘Lightweight yet Powerful’ Message Queue for Real-time Systems

Mastering SOPS for Secret Encryption: Stop API Key Leaks on Git

Proxmox HA: The Ultimate System Rescue at 2 AM Without Leaving Your Bed

Mastering VMware Backup and Restore: Better Safe Than Sorry

Escape ‘Dependency Hell’ on Linux with Nix: The Package Manager That Saved Me at 2 AM

Docker Compose Watch: A Game-Changer for a Seamless Docker Development Experience

Managing Multiple Node.js, PHP, and MariaDB Versions: Fedora’s DNF Modularity “Secret Weapon”

Building Personal Fedora Repos with Copr: No More Manual ‘make install’!