Upgrade an Unmaintained Version of Univention Corporate Server

Problem You’re using an outdated version of Univention Corporate Server. The version you use is not maintained anymore. A simple try to update your instance will lead to errors like this: It will tell you that the unmainted repos cannot be verified anymore. But you might see more errors along the road. Solution There are … Read more

Running VirtualBox and Hyper-V Technology Together on the Same Windows Host Demonstrated by the Example of Proxmox With Child VMs in VirtualBox

Problem Let’s break down the stated problem from the general part to the more specific aspects. The general problem is having Hyper-V features enabled on a Windows host (because you want to use Docker for Windows or in my case WSL2) while also running virtualization using VirtualBox on the exact same machine. Without wanting to … Read more

Proxmox – Change and Apply Network Interface Configuration via Command Line Interface

Problem When you need to change the network configuration of your Proxmox hosts you probably want to do that via the web interface. Most of the times. But then there are situations when you need to make changes directly to the /etc/network/interfaces file for example. Like when you need to add post-up iptable commands. Then … Read more

Setting up a Raspberry Pi as a download station with the help of JDownloader2

This article covers a step by step how-to dealing with the setup of JDownloader2 on Raspberry Pi. The complete setup is meant to be used as the user pi. Take care of it, if you like to set it up for another user. The goal Run a JDownloader2 instance that automatically starts when a desktop … Read more

Setting up a VNC server on Raspberry Pi using tightvncserver

This article covers a step by step how-to dealing with the setup of a remote desktop alternative on Raspberry Pi. The complete setup is meant to be used as the user pi. Take care of it, if you like to set it up for another user. Prerequisites Running Raspian How-to Install tightvncserver: sudo apt-get install … Read more