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How to Configure Virtual Data Optimizer (VDO) on CentOS Stream 9: Optimize Storage with Compression and Deduplication

By IT From Zero October 7, 2026

A detailed guide on configuring LVM-VDO on CentOS Stream 9 for inline compression and deduplication, saving up to 80% disk space on VM and backup servers.

Artificial Intelligence tutorial - IT technology blog

Installing and Configuring Dify on Linux with Docker: Building Production-Ready AI Workflows and RAG

By IT From Zero October 7, 2026

A detailed guide on installing Dify on Linux using Docker Compose, setting up Nginx SSL with SSE streaming support, and optimizing resources for production.

Development

Integrating Meilisearch into Node.js: Sub-50ms Full-Text Search and Typo-Tolerance as an Elasticsearch Alternative

By IT From Zero October 6, 2026

A step-by-step guide to integrating Meilisearch into Node.js applications to build sub-50ms full-text search with typo-tolerance and minimal RAM consumption compared to Elasticsearch.

Security

Securing PostgreSQL Server on Linux: Hands-on with pg_hba.conf, pgcrypto, and pgaudit

By IT From Zero October 6, 2026

Protect PostgreSQL on Linux across 3 layers: restrict IPs with pg_hba.conf, encrypt sensitive columns with pgcrypto, and audit logs for SOC2/PCI-DSS with pgaudit.

VMware

VMware vSphere DirectPath I/O Configuration Guide: PCIe Device Passthrough for Virtual Machines

By IT From Zero October 6, 2026

DirectPath I/O grants virtual machines direct control over physical PCIe devices, eliminating virtualization overhead. Explore the mechanics, trade-offs, and practical setup on ESXi.

Docker

Guide to Deploying Apache Kafka in KRaft Mode with Kafka UI Using Docker Compose

By IT From Zero October 6, 2026

Permanently resolve ZooKeeper OOM errors by migrating to Apache Kafka KRaft mode paired with Kafka UI via Docker Compose. Save 50% RAM with intuitive visual management.

Python

Load Testing Systems with Locust in Python: Real-World Scenarios and API Metric Analysis

By IT From Zero October 6, 2026

A comprehensive guide on writing API load testing scripts with Locust in Python. Explore comparisons between JMeter, k6, and Locust, and learn how to interpret RPS and 95th percentile latency metrics.

Database

Securing SQLite Data with SQLCipher: A Comprehensive Encryption Guide for Desktop and Mobile

By IT From Zero October 6, 2026

A comparison of 3 local database security approaches and a comprehensive guide to SQLite encryption using SQLCipher (AES-256), with Python code, key storage tips, and WAL optimization.

Fedora

Fedora Sericea Setup & Administration Guide: Mastering the Immutable OS with Sway and rpm-ostree

By IT From Zero October 6, 2026

A comprehensive guide to mastering Fedora Sericea: an immutable operating system combining the Sway Tiling Window Manager and rpm-ostree. Learn package layering, containerized development with Toolbx, and safe rollback mechanisms.

Docker

Deploying a Distributed MinIO Object Storage Cluster with Docker Compose: Build Your Own On-Premises S3

By IT From Zero October 6, 2026

A comprehensive guide to deploying a 4-node Distributed MinIO cluster with Docker Compose and Nginx. Build your own fault-tolerant, 100% Amazon S3-compatible object storage.

Building Your Own MCP Server with TypeScript: Connect AI Assistants to Internal Systems

Mastering TanStack Query v5 in React: Practical Server State Management, Caching, and Optimistic Updates

Installing ModSecurity v3 and OWASP CRS on Nginx Ubuntu: Building a Production-Ready Web Server WAF

Centralized Cloudflare Traffic and Security Monitoring with Cloudflare Exporter, Prometheus, and Grafana

Guide to E2B Code Interpreter with Python: Building a Secure Sandbox for AI Agents

A Guide to bpftrace and BCC on Fedora: Linux Performance Analysis and Diagnostics with eBPF

Optimizing Index Merge in MySQL: Understanding Intersection, Union, and Handling Optimizer Missteps

How to Create Systemd Services and Systemd Timers on Ubuntu: A Robust Crontab Alternative

Configuring the FEDERATED Storage Engine in MySQL: Connect and Query Remote Tables

SGLang on Linux Guide: Accelerate LLM Inference and Optimize RadixAttention for AI APIs

How to Configure Virtual Data Optimizer (VDO) on CentOS Stream 9: Optimize Storage with Compression and Deduplication

Installing and Configuring Dify on Linux with Docker: Building Production-Ready AI Workflows and RAG

Integrating Meilisearch into Node.js: Sub-50ms Full-Text Search and Typo-Tolerance as an Elasticsearch Alternative

Securing PostgreSQL Server on Linux: Hands-on with pg_hba.conf, pgcrypto, and pgaudit

VMware vSphere DirectPath I/O Configuration Guide: PCIe Device Passthrough for Virtual Machines

Guide to Deploying Apache Kafka in KRaft Mode with Kafka UI Using Docker Compose

Load Testing Systems with Locust in Python: Real-World Scenarios and API Metric Analysis

Securing SQLite Data with SQLCipher: A Comprehensive Encryption Guide for Desktop and Mobile

Fedora Sericea Setup & Administration Guide: Mastering the Immutable OS with Sway and rpm-ostree

Deploying a Distributed MinIO Object Storage Cluster with Docker Compose: Build Your Own On-Premises S3