Documentation

Here you can find my posts sorted per topic. If there is no link to a specific topic, it haven’t been released yet.

Open Source Infrastructure

Linux

Linux Tutorials

• Linux Tutorial #1: Clean Install of Linux

  • Advanced task: Installing Linux on a M.2 SSD drive

  • Advanced task: Installing Linux on 2 drives

• Linux Tutorial #2: Understanding the Linux boot process

• Linux Tutorial #3: Network Settings

  • Advanced task: Add VLAN interface in Ubuntu

  • Advanced Linux network configuration on Ubuntu 24.04

• Linux Tutorial #4: The Linux Filesystem

  • Advanced task: Format a USB Drive and change the mount point

  • Advanced task: Mount a network drive

• Linux Tutorial #5:

  • Installing applications in Linux Part 1: Package Managers

  • Installing applications in Linux Part 2: APT = Advanced Package Tool

  • Installing applications in Linux Part 3: The Snap Package Manager

• Linux Tutorial #6:

  • File Permissions in Linux Part 1: Concepts and changing ownership

  • File Permissions in Linux Part 2: Configure permissions

Linux Troubleshooting

• Mixed Languages in Kubuntu

• Kubuntu won’t boot

• Bluetooth Headset Microphone is not detected

Linux KVM = Kernel-based Virtual Machine

• Migrating from VMWare ESXi to Linux KVM

Storage and Hypervisor software

PVE = Proxmox Virtual Environment

• PVE Setup Part 1: Preparation and Installation

• PVE Setup Part 2: Network

• PVE Setup Part 3: Physical Storage

• PVE Setup Part 4: Network Storage

• Deploy a Linux server in PVE

TrueNAS

• TrueNAS: An Open Source Storage and Hypervisor Alternative

• TrueNAS Setup Part 1: Installation of TrueNAS on Bare Metal

• TrueNAS Setup Part 2: Network and Storage

• TrueNAS Setup Part 3: Virtual Machines and Networks

  • Related Task: Taking Snapshots of Virtual Machines

• TrueNAS Setup Part 4: Setting up SSL Certificates and LDAPS

Network appliances

pfSense

• Configuring BGP Peering between pfSense and Cisco.

• Configure VLANS on a SG-1100

• Configure DDNS for EasyDNS

• Reverse Proxy Part 1 - The “whats”, “whys” and “hows”

• Reverse Proxy Part 2 - Configure Nextcloud to use a RP

VyOS - Open source Linux router

• VyOS installation

• VyOS configuration fundamentals

• VyOS network and routing configuration

• VyOS: Configure MPLSoDMVPN Between Cisco and VyOS Part 1

• VyOS: Configure MPLSoDMVPN Between Cisco and VyOS Part 2

IDM and PKI related

Free IPA

• FreeIPA Setup Part 1: Installing FreeIPA with DNS Service

• FreeIPA Setup Part 2: Configuring DNS zones

  • Related Task: Make forwarding exceptions for specific DNS records

• FreeIPA Setup Part 3: Installing the FreeIPA Client

  • Related Task: Show Remote Users on login screen on a Kubuntu Client

• FreeIPA Setup Part 4: Group and User Configuration

  • Related Task: Edit User to have admin privileges

• FreeIPA Setup Part 5: Certificate Management

Decentralized Storage

Nextcloud

• Nextcloud - An Open Source alternative for Microsoft Office 365

• Nextcloud Installation Alternative 1: Install Nextcloud with Snap

• Nextcloud Installation Alternative 2: Install Nextcloud AIO = All-In-One

• Install the Nextcloud client

• Nextcloud Talk: Install High-Performance Backend

Container Management

Docker Network Series:

• Part 1: Networks, Address planning and changing the defaults

• Part 2: Customize the network for Docker Swarms

• Part 3: Docker Compose Network Options

  • Docker Compose: Reverse Proxy with Caddy

• Part 4: Reaching the containers IP address externally

  • Docker Compose: Containerized router with VyOS

Podman Network Series

• Goodbye Docker! Hello Podman!

De-Googled Phones

• De-Googled Phones #0: AOSP Overview

• De-Googled Phones #1: Volla Phone

• De-Googled Phones #2: Linux Phones

• De-Googled Phones #3: /e/ OS

Distributed Ledger Technology

DLT Fundamentals

• Foundations of DLT Part 1: Problems with centralized infrastructure

• Foundations of DLT Part 2: How to reach consensus

• Foundations of DLT Part 3: Blockchain Components

• Foundations of DLT Part 4: DeFi = Decentralized Finance

• Foundations of DLT Part 5: DAO = Decentralized Autonomous Organization

• Foundations of DLT Part 6: Practical use-cases for DLT

DLT related

• A futuristic vision

Hedera Hashgraph

• Hedera Hashgraph Part 1: Overview

• Hedera Hashgraph Part 2: Governance and use cases

• Hedera Hashgraph Part 3: Technical details

• Hedera Hashgraph Part 4: Does Hedera really do 10,000 TPS?

The Quest for the perfect Decentralized Economic System

• TQFTPDES Part 1: Bitcoin VS Gold

Privacy & Cyber Security

OpenSSL

OpenSSL Cheat Sheet

Yubikeys and related

• Why I Like Yubikeys

• Passwordless Authentication (FIDO)

• Installing and Managing the Yubikey Manager on Ubuntu

• SSH: Generate a ED25519 security key keypair to use with U2F Authentication

Privacy Related

• Why Privacy is Important

• Linux is the future

• Signal

Open Source applications

Joplin

• Migrating from OneNote to Joplin

• Connect Joplin to Nextcloud

Other IT related stuff

Network Fundamentals

• Network Fundamentals Part 1: The Physical Layers

• Network Fundamentals Part 2: The Network Layer

  • Extra: Advanced Layer 3 Troubleshooting

• Network Fundamentals Part 3: The Transport Layer

• Network Fundamentals Part 4: The Application Layer

Network Automation

Ansible

• Network Automation – Configure 802.1x switchports with Ansible

Big-Tech Infrastructure

Powershell and Windows Server

Windows

• Windows: Setting up IP, DNS and other handy CLI commands

Cisco Systems

ISE = Identity Service Engine

• Upgrade ISE from 2.7 -> 3.1

• Upgrading 3595 UCS appliance firmware, migrating to Smart Licensing and registering with Cisco Smart Software Manager On-Prem

• Upgrading ISE from 3.1 -> 3.2

IOS-XE

• Configuring BGP Peering between pfSense and Cisco.

• Network Automation – Configure 802.1x switchports with Ansible