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Running GitHub Actions Locally with act: ‘Lightning Fast’ Pipeline Debugging Without Pushing Code

By IT From Zero April 11, 2026

Tired of constant 'fix ci' commits? Learn how to use act and Docker to debug GitHub Actions locally, saving time and keeping your Git history clean.

Python

SQLAlchemy ORM: The ‘Gold Standard’ Database Management Solution for Pythonistas

By IT From Zero April 11, 2026

Say goodbye to messy manual SQL queries. This A-Z SQLAlchemy ORM guide helps you manage databases in Python professionally, securely, and efficiently for DevOps.

Fedora

Optimizing zRAM on Fedora: How to ‘Expand’ Your RAM for a Smooth, Lag-Free Experience

By IT From Zero April 11, 2026

Is Fedora lagging with too many tabs open? Discover how to optimize zRAM using zram-generator and zstd to expand your memory and boost system smoothness by over 30%.

Docker

Docker Resource Limits: Don’t Let One Container Crash Your Entire Server

By IT From Zero April 11, 2026

Configuring Docker Resource Limits is a must for professional DevOps. Learn how to limit CPU, RAM, and Disk I/O to prevent server hangs and optimize infrastructure costs.

Artificial Intelligence tutorial - IT technology blog

IT Automation: Don’t Just ‘Chat’ with AI, Turn It Into a Real Agent

By IT From Zero April 11, 2026

No more manual log monitoring! Discover how to combine Python scripts with AI APIs to automatically detect, analyze, and suggest server fixes in seconds.

Monitoring

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

By IT From Zero 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 IT From Zero 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 IT From Zero 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 IT From Zero 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.

Optimizing Redis RAM with HyperLogLog and Bloom Filter: Counting and Deduplicating at Scale

Building an Event-Driven Microservices System with Apache Kafka and NestJS: From Producer and Consumer to Dead Letter Queue (DLQ)

Installing and Configuring Rootless Docker: Run Docker Without Root to Protect Your Host

Configuring a PPPoE Server on Linux Using rp-pppoe for ISP Labs

A Guide to DiskCache in Python: Safe Multi-Process Disk Caching Without Redis

How to Configure Host sFlow on Linux: Real-Time Network Traffic and KVM Monitoring

Diagnosing and Resolving Deadlocks in PostgreSQL: Inspecting Lock Trees and Configuring Proper Timeouts

ESXi Host Configuration Backup and Restore with PowerCLI and ESXCLI: Saving Your Virtualization Cluster During Outages

Guide to VFIO PCIe Passthrough on Linux KVM: GPU Passthrough for Windows VMs

Integrating OpenTelemetry into Python: Practical Microservices Monitoring Strategies

Running GitHub Actions Locally with act: ‘Lightning Fast’ Pipeline Debugging Without Pushing Code

SQLAlchemy ORM: The ‘Gold Standard’ Database Management Solution for Pythonistas

Optimizing zRAM on Fedora: How to ‘Expand’ Your RAM for a Smooth, Lag-Free Experience

Docker Resource Limits: Don’t Let One Container Crash Your Entire Server

IT Automation: Don’t Just ‘Chat’ with AI, Turn It Into a Real Agent

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