Disaster Recovery (DR) is a fundamental component of an organization’s overall business continuity strategy. Its explicit focus is on ensuring that the IT systems supporting
Category: Systems Administration
Comprehensive Guide to Setting Up a Containerized RADIUS Server with FreeRADIUS and a Mikrotik Router For WiFi Access with Captive Portal
In today’s digital age, the demand for secure and efficient network access control has never been higher. Organizations of all sizes are increasingly relying on
Mastering Linux Firewall with UFW (Uncomplicated Firewall): The Ultimate Command Reference & Configuration Guide
UFW (Uncomplicated Firewall) is a simplified interface for managing iptables, the standard Linux firewall. It is designed to make firewall configuration easier while maintaining powerful
Mastering HashiCorp Vault: Essential Guide for Beginners Preparing for Interviews and Exams
Subject: HashiCorp Vault In today’s digital landscape, managing secrets—such as passwords, API keys, and encryption keys—has become a critical aspect of maintaining security and operational
Choosing the Best Open-Source DNS Resolver and Caching Software for Big-Sized MNOs and ISP Environments
In today’s digital age, the demand for reliable and high-performance internet services is at an all-time high. Mobile Network Operators (MNOs) and fixed broadband internet
Repurpose Your Old Server Hardware: Build an Enterprise-Grade Storage System at Zero Cost Using CEPH
In today’s data-driven world, reliable and scalable storage solutions are essential. However, the cost of enterprise-grade storage can be prohibitive, particularly for medium-sized and large
Unable to Access Ollama Models on Open WebUI After Enabling HTTPS: Troubleshooting and Resolution Guide
Introduction This guide is a continuation of my previous article, “Step-by-Step Guide to Set Up HTTPS for Dockerized Open WebUI on Linux”. If you followed
How to Extend Ubuntu Logical Volumes and Resize Filesystem: Step-by-Step Guide for System Administrators
Description: When you install Ubuntu, by default it doesn’t use all the disk space when creating the default logical volume (LV). This requires you to