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Fedora Silverblue: Installation and System Management with rpm-ostree and Toolbox

By admin March 16, 2026

Fedora Silverblue uses OSTree to create an immutable operating system — safe updates and instant rollbacks when something goes wrong. Combined with Toolbox, you get a clean dev environment completely isolated from the host. This article shares practical installation and usage tips from 6 months of real-world experience.

Python

Processing CSV and Excel Files with Python pandas: Comparing Approaches and Practical Implementation Guide

By admin March 16, 2026

Compare three approaches for handling CSV and Excel files with Python: the csv module, pandas, and openpyxl — analyzing trade-offs and guidance on choosing the right tool for each scenario, with real-world examples from an automation project.

Fedora

Using Btrfs Snapshots on Fedora: Fast System Backup and Rollback

By admin March 16, 2026

Btrfs snapshots let you back up and roll back your entire Fedora system in under a second using Copy-on-Write. This guide covers creating snapshots manually, automating them with Snapper and the DNF plugin, and the fast rollback process when something breaks after an upgrade.

Development

Introduction to Infrastructure as Code: A Guide to Automating AWS Infrastructure with Terraform

By admin March 15, 2026

After 6 months running Terraform in production, I walk through the entire journey — from realizing ClickOps was a problem, to installation, writing configs, and safely managing state files with an S3 backend. This article focuses on real-world lessons, not theory.

Network

Free Online Network Tools for SysAdmins: Subnet Calculator, DNS Lookup, IP Converter

By admin March 15, 2026

Free online network tools I keep bookmarked for emergency troubleshooting: Subnet Calculator for CIDR/overlap, DNS Lookup for propagation checks, IP Converter for cross-platform configs — all run directly in the browser, no installation needed.

Artificial Intelligence tutorial - IT technology blog

Building a Simple Chatbot with Python and LLM: Comparing Approaches and a Practical Guide

By admin March 15, 2026

Compare three chatbot-building approaches — rule-based, traditional ML, and LLM — to pick the right architecture for your use case. A practical guide to building a Python chatbot with Claude API: single-turn, multi-turn with conversation history, token limits, and production error handling.

Linux

How to Configure sudo and the sudoers File on Linux: Safe Permission Management for Each User

By admin March 15, 2026

A comparison of 3 approaches to granting sudo access on Linux: adding users to the wheel/sudo group, editing /etc/sudoers directly, or using /etc/sudoers.d/. Covers the pros and cons of each approach along with practical configuration guides using visudo, Command Aliases, and NOPASSWD for team-based production environments.

Virtualization

ZFS Storage for Proxmox VE: Setting Up Pools, Snapshots, and Checksum-Based VM Data Protection

By admin March 15, 2026

ZFS brings block-level data integrity checksums and instantaneous snapshots to Proxmox VE — solving the silent corruption problem that LVM-thin is completely blind to. This guide walks through creating a ZFS pool, configuring compression, automating daily snapshots, and scheduling periodic scrubs to protect your VM data.

Virtualization

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

By admin March 14, 2026

Are you struggling to migrate virtual machines between virtualization platforms like VMware, Hyper-V, and KVM? This article will guide you on how to use the open-source virt-v2v tool to perform an efficient and automated conversion process, helping you optimize your infrastructure and simplify testing.

Network

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

By admin March 14, 2026

VLANs allow us to create multiple virtual networks on the same physical infrastructure, enhancing network security and performance. This article provides detailed instructions on configuring VLANs on Linux, from basic concepts to practical examples.

Advanced Docker Swarm: Rolling Updates, Placement Constraints, and Zero-Downtime Deployments

Hot Add CPU and RAM on VMware vSphere: Upgrade Virtual Machine Resources Without Rebooting

Docker-in-Docker (DinD) vs Docker-out-of-Docker (DooD): A Practical CI/CD Runner Setup Guide

Mastering /proc and /sys: Inspecting Linux Internals Without Third-Party Tools

Mastering DeepSeek-R1 on Linux: Optimizing “Home-Grown” Reasoning AI for Peak Performance

Dockerize WordPress: Accelerate Your MariaDB and Redis Cache Stack for Production

Automating File Monitoring with Python Watchdog: Stop Polling and Start Listening

Grafana Pyroscope: Hunting Down CPU and RAM “Hogs” Directly on Production

Mastering VMware Host Profiles: The Ultimate Way to Standardize ESXi Cluster Configurations

Varnish + Nginx: The Ultimate Lifesaver for High-Traffic Websites on Ubuntu

Fedora Silverblue: Installation and System Management with rpm-ostree and Toolbox

Processing CSV and Excel Files with Python pandas: Comparing Approaches and Practical Implementation Guide

Using Btrfs Snapshots on Fedora: Fast System Backup and Rollback

Free Online Network Tools for SysAdmins: Subnet Calculator, DNS Lookup, IP Converter

Building a Simple Chatbot with Python and LLM: Comparing Approaches and a Practical Guide

How to Configure sudo and the sudoers File on Linux: Safe Permission Management for Each User

ZFS Storage for Proxmox VE: Setting Up Pools, Snapshots, and Checksum-Based VM Data Protection

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

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