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Virtualization tutorial - IT technology blog

QEMU/KVM Installation and Configuration Guide on CentOS/RHEL: Optimizing Virtualization Performance

By admin March 13, 2026

KVM/QEMU on CentOS/RHEL is a high-performance virtualization solution, ideal for servers and homelabs. This article provides a detailed guide to installation, configuration, and performance optimization, sharing practical experience to help you master this platform from A to Z.

Database

How to Install and Configure PostgreSQL Streaming Replication: Real-time Data Synchronization between Primary and Standby

By admin March 13, 2026

Learn how to set up PostgreSQL Streaming Replication for High Availability and Disaster Recovery. A step-by-step guide to configuration and data synchronization between Primary and Standby.

MySQL

MySQL Server Security: Essential Steps to Protect Production Data

By admin March 13, 2026

MySQL server security is vital for protecting production data. This article compares security methods, from basic configuration to SSL/TLS implementation and firewalls. It provides detailed steps to ensure the safety of your database.

Artificial Intelligence tutorial - IT technology blog

Building a Multi-Platform AI Chatbot: Integrating Telegram, Slack, and Discord

By admin March 13, 2026

This article guides you through building a multi-platform AI chatbot, seamlessly integrating with Telegram, Slack, and Discord using Python. You'll learn about modular architecture, platform configuration, and practical deployment for an intelligent, time-saving, and performance-optimized chatbot.

Virtualization

Automate Virtual Machine Deployment on Proxmox/KVM with Cloud-Init: Create Templates and Customize on First Boot

By admin March 13, 2026

Discover Cloud-Init on Proxmox/KVM: The solution for automating virtual machine deployment and configuration from the first boot. Save time, reduce errors, and increase consistency for your homelab infrastructure.

Security

Optimizing Secure Management of Secrets, API Keys, and Credentials on Linux with HashiCorp Vault

By admin March 13, 2026

Managing secrets like API keys and credentials is a major challenge for many IT engineers. HashiCorp Vault offers a powerful solution to address this problem. This article guides you through installing, configuring, and using Vault on Linux, helping to maximize the protection of sensitive data.

Virtualization

How to Configure Nested Virtualization on Proxmox VE: Running Hypervisors (ESXi, KVM) Inside Virtual Machines for Complex Lab Setups

By admin March 12, 2026

Create complex virtual labs like vCenter, Kubernetes clusters with Nested Virtualization on Proxmox VE. This article provides a step-by-step guide to enabling this feature, allowing you to run ESXi or KVM inside virtual machines to maximize existing hardware resources.

Git

Git Stash: A Quick Solution When Urgent Issues Interrupt Unfinished Work

By admin March 12, 2026

Deep in coding, but your boss calls with an urgent production bug? Git stash is the tool to temporarily save your work without committing, keeping your branch clean to handle emergencies. This article provides a detailed guide on using git stash, from basic to advanced commands, helping you master this essential tool.

MySQL

Setting Up and Configuring ProxySQL: A Connection Pooler and Load Balancer Solution for MySQL Production

By admin March 12, 2026

ProxySQL is a powerful connection pooler and load balancer that optimizes performance and stability for MySQL production. This article provides a guide to basic and advanced installation and configuration, along with practical tips for effective ProxySQL deployment, addressing connection management and load distribution issues.

Network

Basic Network Knowledge for SysAdmins: IP, Subnet, Gateway – Indispensable Foundations

By admin March 12, 2026

This article delves into three foundational concepts of computer networking: IP Address, Subnet Mask, and Gateway. You'll understand how they work, why they're crucial for SysAdmins, and how to configure them on Linux, along with practical experiences from a SysAdmin managing office and datacenter networks.

virt-v2v Guide: Easily Convert Virtual Machines from VMware, Hyper-V to KVM

Configuring VLAN on Linux: Network Isolation, Enhanced Security, and Easy Management

Nginx TLS 1.3 Configuration Guide and Cipher Suite Optimization: Achieve A+ on SSL Labs

How to Use Google Gemini API with Python: Efficient Implementation from Basics to Production

Efficient Physical to Virtual (P2V) Server Migration with VMware vCenter Converter Standalone

Guide to configuring SMS and Telegram alerts with Alertmanager

Guide to Installing and Optimizing MongoDB for Production Environments

VirtualBox: Advanced Network Configuration – Shared Folders, VPN, and Isolated Environments for IT

Zabbix Installation Guide from A-Z: Build Your Own Professional Monitoring System

Guide to Configuring SSH Tunnel: Local, Remote, and Dynamic Port Forwarding

QEMU/KVM Installation and Configuration Guide on CentOS/RHEL: Optimizing Virtualization Performance

How to Install and Configure PostgreSQL Streaming Replication: Real-time Data Synchronization between Primary and Standby

MySQL Server Security: Essential Steps to Protect Production Data

Building a Multi-Platform AI Chatbot: Integrating Telegram, Slack, and Discord

Optimizing Secure Management of Secrets, API Keys, and Credentials on Linux with HashiCorp Vault

How to Configure Nested Virtualization on Proxmox VE: Running Hypervisors (ESXi, KVM) Inside Virtual Machines for Complex Lab Setups

Git Stash: A Quick Solution When Urgent Issues Interrupt Unfinished Work

Setting Up and Configuring ProxySQL: A Connection Pooler and Load Balancer Solution for MySQL Production

Basic Network Knowledge for SysAdmins: IP, Subnet, Gateway – Indispensable Foundations