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Development tutorial - IT technology blog

A Practical Guide to pgvector on PostgreSQL: Vector Embeddings and Semantic Search for Node.js

By IT From Zero October 19, 2026

Practical production lessons deploying pgvector on PostgreSQL: Node.js integration, HNSW index tuning, and memory optimization techniques to slash latency from 8s to 20ms.

Git

Mastering git for-each-ref: Precise Branch and Tag Filtering and Formatting for Automation

By IT From Zero October 19, 2026

The git for-each-ref plumbing command extracts precise branch and tag metadata without relying on awk or grep—the ideal solution for safe, automated Git repository cleanup in CI/CD.

Python

A Guide to Granian in Python: A Rust-Based ASGI Web Server to Replace Uvicorn

By IT From Zero October 19, 2026

A hands-on review and migration guide from Uvicorn to Granian, a Rust-based ASGI web server. Double your throughput and keep RAM under 100MB for FastAPI apps.

Virtualization

Configuring a Corosync Redundant Network (Dual Ring) on Proxmox VE to Prevent Split-Brain

By IT From Zero October 19, 2026

A step-by-step guide to configuring Corosync Dual Ring on Proxmox VE. Learn how to deploy a redundant network with Kronosnet to protect your High Availability cluster from lost quorum and split-brain scenarios.

Virtualization

Migrating VirtualBox VMs to KVM/Proxmox VE: Converting VDI to QCOW2 and Fixing VirtIO Boot Errors

By IT From Zero October 19, 2026

Experiencing a BSOD or boot freeze after migrating VirtualBox to KVM/Proxmox VE? Learn how to convert VDI to QCOW2 with qemu-img and properly inject VirtIO drivers for both Windows and Linux.

Security

How to Install and Configure Suricata IDS/IPS on Linux: Real-Time Network Traffic Monitoring and Intrusion Prevention

By IT From Zero October 19, 2026

A detailed comparison of passive IDS and inline IPS architectures for Suricata on Linux. Learn how to configure Suricata with NFQUEUE, tune rulesets, and test real-time threat prevention.

Database

How to Install and Use VictoriaMetrics: An Optimized Time-Series DB to Replace Prometheus

By IT From Zero October 19, 2026

Compare monitoring scaling strategies and learn how to deploy VictoriaMetrics with Docker, cutting RAM usage by 4x and saving up to 7x disk space compared to Prometheus.

Monitoring

Monitoring ClickHouse with Prometheus and Grafana: Query Performance, Mutations, and RAM

By IT From Zero October 19, 2026

A comprehensive guide to leveraging ClickHouse's native OpenMetrics endpoint with Prometheus and Grafana. Master critical PromQL queries to monitor QPS, Part Mutations, and RAM usage to prevent downtime.

Artificial Intelligence tutorial - IT technology blog

Building a Vision RAG Pipeline with ColPali and Byaldi: Parse Complex PDF Tables Without OCR

By IT From Zero October 19, 2026

A hands-on guide to building a Vision RAG pipeline with ColPali and Byaldi. Skip OCR entirely and query complex PDF tables, layouts, and charts with high precision.

Ubuntu

Optimizing RAM on Ubuntu with zRAM and Swap for Low-End VPS

By IT From Zero October 18, 2026

Combining high-speed zRAM with a fallback Swap file keeps 1GB–2GB RAM Ubuntu VPS instances stable and crash-free during traffic spikes. Full setup with practical sysctl tuning.

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

A Practical Guide to pgvector on PostgreSQL: Vector Embeddings and Semantic Search for Node.js

Mastering git for-each-ref: Precise Branch and Tag Filtering and Formatting for Automation

A Guide to Granian in Python: A Rust-Based ASGI Web Server to Replace Uvicorn

Configuring a Corosync Redundant Network (Dual Ring) on Proxmox VE to Prevent Split-Brain

Migrating VirtualBox VMs to KVM/Proxmox VE: Converting VDI to QCOW2 and Fixing VirtIO Boot Errors

How to Install and Configure Suricata IDS/IPS on Linux: Real-Time Network Traffic Monitoring and Intrusion Prevention

How to Install and Use VictoriaMetrics: An Optimized Time-Series DB to Replace Prometheus

Monitoring ClickHouse with Prometheus and Grafana: Query Performance, Mutations, and RAM

Building a Vision RAG Pipeline with ColPali and Byaldi: Parse Complex PDF Tables Without OCR

Optimizing RAM on Ubuntu with zRAM and Swap for Low-End VPS