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Configuring SR-IOV on Linux: Achieving Near Bare-Metal Network Performance for KVM Virtual Machines

By IT From Zero October 9, 2026

SR-IOV enables KVM virtual machines to communicate directly with physical network adapters, bypassing the hypervisor to achieve maximum throughput and microsecond latency. Here is a complete guide to setup and troubleshooting peak-hour packet drops in production.

VMware

How to Safely Reset a Lost or Forgotten ESXi Root Password

By IT From Zero October 9, 2026

Discover 3 safe ways to recover a lost VMware ESXi 7.0/8.0 root password using an Ubuntu Live USB, vCenter Host Profile, or reinstalling without losing VM data.

Artificial Intelligence tutorial - IT technology blog

LightRAG with Python Tutorial: Building Fast, Cost-Optimized Graph RAG

By IT From Zero October 9, 2026

A step-by-step guide to building a Graph RAG system with LightRAG in Python. A dual-level knowledge graph approach that slashes token costs by 90% while solving complex multi-hop synthesis queries.

Getting Started with ScrapeGraphAI: Automating Web Scraping with LLMs and Python

By IT From Zero October 9, 2026

A comprehensive guide on configuring ScrapeGraphAI with OpenAI and Ollama, optimizing token usage, and building self-healing web scraping pipelines for production.

VMware

Enable VMware vSphere Quick Boot: Cut ESXi Maintenance Reboot Time by 80%

By IT From Zero October 9, 2026

VMware vSphere Quick Boot allows ESXi to bypass the BIOS/UEFI POST process, slashing reboot times from 15 minutes to under 90 seconds. Learn how to verify compatibility, enable it in vLCM, and troubleshoot real-world issues.

Network

Configuring Kea DHCPv6 on Linux: Practical Stateful IPv6 Allocation and Prefix Delegation

By IT From Zero October 9, 2026

Hands-on guide to deploying Kea DHCPv6 on Linux: managing stateful IPv6 address allocation, automated subnetting via Prefix Delegation (IA_PD), and Router Advertisement integration.

Network

Configuring DHCP Relay Agent on Linux: Forwarding IP Assignment Requests Across Multiple Subnets and VLANs

By IT From Zero October 8, 2026

When a network has multiple VLANs, a centralized DHCP server can't assign IPs to clients on other subnets because broadcasts don't cross routers. DHCP Relay Agent solves exactly this problem — this guide covers configuring isc-dhcp-relay on Linux and handling the most common errors.

Fedora

Deploying a RabbitMQ Cluster on Fedora Server: Building a Fault-Tolerant Message Broker with SELinux and firewalld

By IT From Zero October 8, 2026

Single-node RabbitMQ is a fine starting point, but it's also a single point of failure. This article compares three approaches to clustering (bare-metal, Podman, and Kubernetes), then dives straight into a step-by-step guide to setting up a 3-node cluster on Fedora Server — covering SELinux policies, firewalld rules, and Quorum Queues for genuine high availability.

Virtualization

How to Set Up Virtual Machine Manager (VMM) on Synology NAS: Running Linux and Windows VMs from Your NAS

By IT From Zero October 8, 2026

Synology Virtual Machine Manager (VMM) lets you run Linux and Windows virtual machines directly on your NAS without a dedicated server. This guide walks through every step: checking hardware compatibility, installing VMM, configuring storage and a virtual switch, creating VMs, and setting up monitoring.

Ubuntu

Btrfs + Snapper on Ubuntu: Configure Automatic Snapshots and Instant Rollback When Your System Breaks

By IT From Zero October 8, 2026

Btrfs snapshots combined with Snapper are the most effective way to protect your Ubuntu Server — automatically snapshotting before every apt run and rolling back from GRUB even when the system won't boot. This article compares it against rsync and Timeshift, walks through a step-by-step installation, and covers real-world recovery scenarios.

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

Configuring SR-IOV on Linux: Achieving Near Bare-Metal Network Performance for KVM Virtual Machines

How to Safely Reset a Lost or Forgotten ESXi Root Password

LightRAG with Python Tutorial: Building Fast, Cost-Optimized Graph RAG

Getting Started with ScrapeGraphAI: Automating Web Scraping with LLMs and Python

Enable VMware vSphere Quick Boot: Cut ESXi Maintenance Reboot Time by 80%

Configuring Kea DHCPv6 on Linux: Practical Stateful IPv6 Allocation and Prefix Delegation

Configuring DHCP Relay Agent on Linux: Forwarding IP Assignment Requests Across Multiple Subnets and VLANs

Deploying a RabbitMQ Cluster on Fedora Server: Building a Fault-Tolerant Message Broker with SELinux and firewalld

How to Set Up Virtual Machine Manager (VMM) on Synology NAS: Running Linux and Windows VMs from Your NAS

Btrfs + Snapper on Ubuntu: Configure Automatic Snapshots and Instant Rollback When Your System Breaks