Malte Hellmeier

DevOps

Traefik: Logrotate Large (Access) Log Files

This tutorial describes how to prevent big log files from consuming a lot of disk space by using Traefik's configuration and logrotate.

DevOps

netcup Server Umzug: Festplatte via Snapshot migrieren

Wir erklären den Umzug eines root / VPS Servers innerhalb von netcup auch über verschiedene Generationen mithilfe von Snapshot Import / Export.

Electronics

Docking Station Comparison: CalDigit TS3+ vs. Lenovo ThinkPad Dock vs. Dynabook Thunderbolt 4 Dock

This article compares three famous Thunderbolt and USB-C docking stations for Windows and macOS: the CalDigit TS3+, the Lenovo ThinkPad Dock, and the Dynabook Thunderbolt 4 Dock.

Raspberry Pi

Pi-hole "BOGUS (refused upstream)" Error

If the "BOGUS (refused upstream)" error occurs when using Pi-hole as a DNS server in the local network, these fixes solve the DNSSC problem.

Apple

Fix Spotify & Apple AirPods Pro Randomly Changing Volume Level

How to fix the problem or bug of randomly changing the volume level of Apple AirPods Pro 2 used with the Spotify app, tested on iOS 17.

Electronics

USB Overview: Differences between Ports, Colors, Standards, and Speed (USB-A, USB-C, USB 2.0/3.0/3.1/3.2, Thunderbolt 3/4/5, ...)

This guide overviews different USB ports and standards like USB-A, USB-B, USB-C, USB 1.0/2.0/3.0/3.1/3.2, Gen 1/2/3/4, and Thunderbolt 1/2/3/4/5.

Apple

Disable or Remove macOS Autostart Programs & Applications (e.g. Ivanti VPN Client)

Different ways to remove or disable different programs or applications from Apple macOS autostart after login (e.g. Ivanti Secure Access Client).

Raspberry Pi

Opel / Peugeot Electric Vehicle: Set Charging Threshold Limit (to 80%)

A Python script is presented on how to set the charging threshold or limit for PSA battery-powered EVs (e.g., to 80%) to stop at a desired level.

Raspberry Pi

Fix Bluetooth Problems on Raspberry Pi running Raspberry Pi OS (Raspbian)

Shows fixes for Raspberry Pi OS Bluetooth problems like device not found, no default controller available, or running Bluetooth in docker.

DevOps

Transfer Files Between Two FTP Servers (Move Website)

This article describes how to transfer files and folders from one webhosting FTP server to another provider, e.g. for moving a website.

Smart Home

Device / Printer doesn't Connect to Best Repeater over Mesh

Workaround if a device (printer) doesn't connect to the best wireless repeater in a local AVM FRITZ! based WiFi network using Mesh technology.

Linux

Ubuntu Boot Loop Problem: Fix Full Disk with 0 Bytes Space Left

If the Linux system boots in an infinite loop, the root filesystem partition is maybe full with 0 bytes left. I will show tips to free up space.

Apple

Transfer Contacts from Google to Apple: Fix Import/Export Problems (Birthday, Address, Picture, etc. missing)

There are several problems when importing vCards from Google to Apple Contacts: Birthdays without years, addresses without labels, profile pictures etc.

Photography

Photography Problems: Pink / Purple Lines on Long Exposure Images with ND Filters

I noticed pink / purple lines on the resulting images of my long exposure shots with my DSLR camera on sunny days and ND filters applied.

Tools

[How-to] Microsoft Teams: Add Animated Video Background Image (GIF)

Microsoft Teams doesn't allow to add an animated video background. This tutorial shows a trick how to change the virtual background into a GIF image.

macOS

Fix: macOS Network drops with LAN over USB-C Docking Station in Zoom, Teams, ...

If your MacBook with a LAN docking station kicks you out of meetings over Zoom, Microsoft Teams, BigBlueButton,... after a short time, I show how to fix it.

Smart Home

[How-to] Connect IKEA TRÅDFRI Devices (Lights, Driver, I/O Dimmer, ...) to Philips Hue Bridge

Since IKEA TRÅDFRI and Philips Hue both use ZigBee, this article shows how to use the I/O Dimmer to control lights and drivers over a Hue Bridge / Gateway.

Apple

Canon Printer: Enable macOS Big Sur Scan Function in System Settings

The scan function of my Canon Pixma MX925 multifunction printer isn't available in the Apple macOS Big Sur system settings. I will show you how to enable it.

Off-Topic

Field Report: Testing the 28-Hour Day Sleep Schedule for One Week

A field report, experiences, tips and thoughts from living one week in the 28-hours per day sleep cycle. The initial idea is based on a xkcd comic.

DevOps

macOS Big Sur: Python 3.7 Installation with Homebrew

A step-by-step tutorial on how to install Python 3.7 on macOS Big Sur with Homebrew and fix all upcoming bugs, errors and problems with popular packages.

Review

[Quality Test] Spotify vs. TIDAL: Music Streaming Comparison

This article compares the best and highest sound qualities of the music streaming services Spotify and TIDAL in a personal field test over 3 month.

DevOps

Self-Host and Dockerize Standard Notes Extensions with Docker-Compose

In this article we show how to use docker and docker-compose to host Standard Notes extensions on your own infrastructure.

DevOps

CSF / LFD Firewall: csf.pignore not working or ignoring processes

Sometimes, processes added to the csf.pignore file aren't ignored and alert mails still arrive. This article introduces several solutions and fixes.

Raspberry Pi

Raspberry Pi – Basic Setup on Raspbian (Raspberry Pi OS)

This quick guide describes the important steps to create a fully working Raspbian (Raspberry Pi OS) system (langauge setup, static IP, expand disk etc.).

DevOps

[How-to] Migrate ownCloud 10.5.0 to Nextcloud

This step-by-step tutorial explains how to migrate an existing ownCloud instance to Nextcloud by preserving existing shares and federations.