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Monitoring Linux System Resources with htop and iotop: A Practical Guide

By admin March 6, 2026

A practical guide to using htop and iotop for monitoring CPU, RAM, and disk I/O on Linux servers. Covers metric interpretation, practical keyboard shortcuts, common bottleneck diagnostic scenarios, and automated monitoring scripts.

Centos

Managing Services with firewalld on CentOS/RHEL: A Practical Guide

By admin March 6, 2026

firewalld is the default firewall management tool on CentOS/RHEL, offering flexible zone-based policies that are easier to manage than plain iptables. This article covers practical usage from quick start to rich rules, port forwarding, and tips drawn from real production server management.

Artificial Intelligence tutorial - IT technology blog

IronClaw Installation Guide: A Rust-Written AI Assistant Focused on Security and Privacy

By admin March 6, 2026

IronClaw is a Rust-written CLI AI assistant that runs entirely locally and never transmits data externally — a practical solution for developers who need AI assistance while working with sensitive data. This guide covers everything from installation and Ollama backend configuration to security setup and real-world daily workflows.

Centos

Configuring SELinux on Rocky Linux: Don’t Disable It Before You Understand What It Does

By admin March 6, 2026

From firsthand experience migrating 5 servers off CentOS 8 EOL to Rocky Linux, this guide covers how to configure SELinux properly — from Permissive for debugging to Enforcing on production — with practical audit2allow, sealert, and semanage examples.

Network

How to Use nmap for Network Scanning and Linux Server Security Auditing

By admin March 6, 2026

A practical guide to using nmap for port scanning, service detection, and Linux server security auditing — drawn from real infrastructure management experience. Covers basic commands, NSE scripts, and an automation script for weekly audits.

Security

WireGuard VPN on Ubuntu Server: Complete Setup and Configuration from A to Z

By admin March 5, 2026

WireGuard runs directly in the Linux kernel, delivering significantly better performance than OpenVPN (real-world benchmarks: 100–200Mbps vs nearly 1Gbps) with far simpler configuration. This guide walks through each step in practice: installation, key pair generation, server and client configuration on Ubuntu Server — plus troubleshooting for common issues.

Docker

Docker Compose: Managing Multi-Container Applications from Real-World Experience

By admin March 5, 2026

Docker Compose lets you define and run an entire multi-container stack with a single YAML file and a single command. This article shares real-world patterns: proper healthchecks, environment separation with .env files, resource limits, and the commands that actually come up in daily work.

Docker

Docker for Beginners: Understanding Containers, Images, and Volumes from Scratch

By admin March 5, 2026

Docker solves the classic 'it works on my machine' problem by packaging your entire application into isolated containers — far lighter than VMs. This guide walks you through installing Docker on Ubuntu, explains the core concepts of Images, Containers, Volumes, and Networks, and shows you how to monitor containers in a real-world environment.

Docker

Docker Container Security: Best Practices for Developers

By admin March 5, 2026

A practical guide to Docker container security: from non-root users and read-only filesystems to network isolation, secret management, and vulnerability scanning. A complete checklist to review before deploying to production.

Security

A Practical Guide to Using AI Tools Safely in the Enterprise: Policy, Controls, and Deployment

By admin March 5, 2026

Employees use ChatGPT, Claude, and Copilot daily — but not everyone realizes how much enterprise data they're putting at risk. This article compares 3 popular approaches for managing AI tools in an enterprise environment and provides a practical implementation guide covering DLP scripts, Squid proxy whitelisting, self-hosted LLM setup, and an effective AI usage policy.

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

Monitoring Linux System Resources with htop and iotop: A Practical Guide

Managing Services with firewalld on CentOS/RHEL: A Practical Guide

IronClaw Installation Guide: A Rust-Written AI Assistant Focused on Security and Privacy

Configuring SELinux on Rocky Linux: Don’t Disable It Before You Understand What It Does

How to Use nmap for Network Scanning and Linux Server Security Auditing

WireGuard VPN on Ubuntu Server: Complete Setup and Configuration from A to Z

Docker Compose: Managing Multi-Container Applications from Real-World Experience

Docker for Beginners: Understanding Containers, Images, and Volumes from Scratch

Docker Container Security: Best Practices for Developers

A Practical Guide to Using AI Tools Safely in the Enterprise: Policy, Controls, and Deployment