Author: ro

  • Cheatsheet of useful Linux commands

    Last update: Nov 2024 Motivation I am using this for noting my snippets for everyday use. Mostly those commands are tested and developed on latest Ubuntu. Warning Many of those commands here are dangerous and will potentially mess up your system. Be warned: Don‘t use them if you do not know what you‘re doing! Secure…

  • How to: Install PiHole (DNS-Adblocker) and PiVPN (Wireguard) on Ubuntu

    Metadata Tested with: Ubuntu 24.04, PiHole 5.18.3, PiVPNLast Update: Nov 2024 Requirements 1. Install PiVPN 2. Install PiHole 3. Add powerful adlists Further Configuration Keep in mind that the default setting for WireGuard is ALLOWED_IPS=”0.0.0.0/0, ::0/0″. This means all traffic will be sent through the VPN tunnel. If you plan to make just some specific…

  • How to: Install Nextcloud AiO using Docker and NGINX Proxy Manager

    Metadata Tested with: Ubuntu 22.04, NC AiO 9.7.0, NPM 2.11.3Last Update: Oct 2024 Requirements Steps 1. Install Docker 2. Config 3. Start containers 4. Config NPM 5. Initial installation Troubleshooting Credits

  • How to: Dualboot Windows +Bitlocker and Kubuntu +LUKS

    Preparation Tested with Tested with: Win 11 Pro 23H2, Kubuntu 24.04Last Update: 2024-09-29 Environment Steps 1. Create partitions 2. Install Windows 3. Install Kubuntu Both systems can boot up properly now. You will be asked by GRUB which operating system to boot now: Ubuntu or Windows Boot Manager. 4. Activate Windows Bitlocker Good to know…

  • How to: Install VirtualBox 7.1 on Ubuntu 24.04

    Preparation none Tested with Tested on: Kubuntu 24.04, VirtualBox 7.1Last Update: 2024-10-15 Environment Steps We will install the packages by adding the official repository and installing the packages from there. 1. Adding repository 2. Installing packages 3. Installing Secure Boot Key During reboot you will be asked by UEFI BIOS to enroll the VirtualBox key:…

  • How to: Dualboot Windows +Bitlocker and Ubuntu +LUKS

    Preparation Tested with Tested with: Win 11 Pro 23H2, Ubuntu 23.10Last Update: 2024-09-26 Environment Steps 1. Create partitions 2. Install Windows 3. Install Ubuntu Both systems can boot up properly now. You will be asked by GRUB which operating system to boot now: Ubuntu or Windows Boot Manager. 4. Activate Windows Bitlocker Good to know…

  • How to: Install Elastic Stack on Debian 11 Bullseye

    Meta Last update: Sept 2022Tested with: Debian 11, Elastic Stack 8.4 1. Preparation This is my very personal configuration. All you really need is to have the sudo-package installed. Everything else is optional. 2. Elasticsearch You will get an output like: Start the Elasticsearch service and check if the service is running after a short…

  • Wie Meltdown funktioniert

    Letztes Update: Aug 2020 1. Einleitung Unsere heutigen gewöhnlichen Computersysteme funktionieren nach dem Prinzip der sog. Von-Neumann-Architektur nach welcher es im Computer einen gemeinsamen Speicher gibt, der sowohl Programmbefehle als auch Daten hält. Mit Daten sind unsere gewöhnlichen Nutzdaten gemeint, die wir als Nutzer speichern und verarbeiten. Da sich dies nur in dem für den…

  • How to set up Postfix on Debian 11 to use a mailhoster with SMTP

    Latest update: Aug 2022 Important notes Installation of packages Configuration of Postfix Configuration of password file Testing Troubleshooting