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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.

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.

Fedora

Configuring Btrfs Subvolumes on Fedora: Optimizing Space and Rapid System Recovery

By admin March 11, 2026

This article provides detailed instructions on configuring and managing Btrfs subvolumes on Fedora. Learn to create and manage snapshots for system rollbacks and optimize disk space, ensuring stability and flexibility for IT workflows.

Security

Linux Security Audit Logs: Experiences from an IT Engineer

By admin March 11, 2026

As an IT engineer, I know the importance of auditing Linux security logs. My server once suffered an SSH brute-force attack in the middle of the night—since then, I prioritize log auditing to detect threats early and protect the system.

Fedora

Guide to Migrating from Docker to Podman on Fedora: Safer, More Efficient for Devs

By admin March 10, 2026

This article provides a detailed guide on migrating from Docker to Podman on Fedora. It analyzes pros and cons, explains Podman installation, rootless container configuration, and effective Docker Compose alternatives for a safer, optimized development environment.

Linux

Log Rotation on Linux with Logrotate: Rescuing Your Disk Drive in the Middle of the Night

By admin March 10, 2026

As an IT engineer, I've experienced servers crashing at 2 AM due to full log files. This article consolidates hard-earned experience on using Logrotate on Linux, an indispensable tool for automatically managing, rotating, and compressing log files to keep your system stable and efficient.

Virtualization

How to Remotely Manage KVM Virtual Machines with the virt-manager GUI

By admin March 9, 2026

Fixing bugs on a KVM server late at night using only the virsh command line? There's a better way! This guide shows how to use virt-manager to remotely manage KVM VMs via SSH, providing an intuitive GUI to handle incidents faster and more effectively.

Security

Enhancing SSH Security: A Guide to Setting Up 2FA with Google Authenticator

By admin March 9, 2026

Don't let your server be compromised by a password alone. This guide will show you how to set up a second layer of 'armor' for SSH using your phone with Google Authenticator.

Linux

Installing and Configuring NTP Server on Linux: Fixing Time Sync Issues in Production

By admin March 2, 2026

A guide to installing chrony and configuring internal NTP server/client on Linux, drawn from real production operations experience. Covers cluster configuration, firewall setup, offset verification, and a basic monitoring script.

Network

Configuring IPv6 on Linux Servers: Static Addresses, Dual-Stack, and Real-World ip6tables

By admin March 2, 2026

Step-by-step guide to configuring IPv6 on Linux servers: enabling IPv6, assigning static addresses on Ubuntu/Debian and CentOS/Rocky, setting up dual-stack, ip6tables firewall, and troubleshooting real-world issues.