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Gophish: Build Your Own Phishing Simulation System for Internal Security Testing and Training on Linux

By admin June 24, 2026

Gophish is an open-source tool that lets you run internal phishing simulations without paying for an expensive external service. This guide covers installation, end-to-end campaign configuration, and how to analyze results to genuinely improve your team's security awareness.

Linux

Protecting Linux Files From Root: Mastering chattr and lsattr

By admin June 22, 2026

Root privileges aren't the final word. Discover the power of chattr and lsattr to lock files, prevent accidental deletion, and harden your Linux server security.

Linux

Mastering OverlayFS: How to Create an ‘Undo Button’ for Your Linux System

By admin June 22, 2026

Learn how to use OverlayFS on Linux to protect system data. This article provides a detailed guide on the Copy-on-Write mechanism and how to create a secure sandbox environment.

Centos

How to Use sosreport on CentOS Stream 9: Collect and Analyze System Information for Professional Troubleshooting

By admin June 20, 2026

sosreport is Red Hat's official tool for collecting complete system information with a single command, replacing the need to run dozens of manual commands every time an incident occurs. This article compares different approaches to information gathering, weighs their pros and cons, and walks through a practical sosreport deployment on CentOS Stream 9 — including a script you can integrate directly into your incident response workflow.

Network

Configuring iSCSI Multipathing on Linux: Maximize Bandwidth and SAN Connection Redundancy

By admin June 20, 2026

A complete guide to configuring iSCSI Multipathing on Linux, from basic setup to advanced tuning: establish multiple parallel connections to SAN storage to increase bandwidth and ensure redundancy when a path fails. Covers load balancing configuration, jumbo frames, real-world failover testing, and troubleshooting.

Virtualization

QEMU Guest Agent: Installation and Configuration on Linux/Windows for Consistent Snapshots and VM Monitoring

By admin June 20, 2026

QEMU Guest Agent (qemu-ga) is a daemon running inside the VM that freezes the filesystem before snapshots are taken, ensuring data consistency and preventing corruption on restore. This guide covers installation on Linux and Windows, configuration with KVM/libvirt and Proxmox, plus troubleshooting for common issues.

Monitoring

Monitoring Systemd with Prometheus: Don’t Let Your Server Stay ‘Alive’ While Your App Is ‘Dead’

By admin June 20, 2026

Don't let a green dashboard fool you when internal services have crashed. Detailed guide on using Prometheus Systemd Exporter to monitor uptime and handle Linux service errors effectively.

Fedora

Dual Boot Fedora Linux and Windows 11: Configuring UEFI, Secure Boot, and GRUB2 for Safe Parallel Booting

By admin June 18, 2026

A guide to setting up Fedora Linux and Windows 11 dual boot on UEFI, keeping Secure Boot enabled through MOK enrollment, properly partitioning the EFI partition, and recovering GRUB2 after Windows Update overwrites the boot entry.

Ubuntu

Ubuntu Frame: The ‘All-in-one’ Solution for Kiosks and Embedded Displays on Wayland

By admin June 17, 2026

Ubuntu Frame is a modern X11 replacement for building Kiosk displays and embedded devices. A detailed guide on installation, screen rotation, and running a smooth Web Kiosk.

Virtualization

Enable Hyper-V on Windows 11 and Create Virtual Machines with PowerShell: Practical Tips for Developers

By admin June 16, 2026

A guide to enabling Hyper-V on Windows 11 and creating Linux/Windows VMs with PowerShell — from checking CPU support and creating virtual switches to automation scripts that spin up an Ubuntu VM in minutes. Practical tips for developers who need a Linux environment directly on their Windows machine without installing extra software.