During a recent installation of Red Hat Identity Management or FreeIPA I stumbled upon the following error message:

1DEBUG The ipa-server-install command failed, exception: RuntimeError: CA did not start in 300.0s
2ERROR CA did not start in 300.0s
3ERROR The ipa-server-install command failed. See /var/log/ipaserver- …

There are plenty of radiators and fans for the small single-board computer - but how big is the impact of using cooling? Don't get me wrong - having a cooling system is always better than having no cooling at all. But I was curious about the exact difference with the current top model (RPi 4B, 4 GB).

First of all it is …

In the last part of this series we linked Rhasspy and Node-RED to teach the assistant its first function: reading the current date and time. In this part we will focus on measuring temperature via the internet and DIY temperature guards based on ESP32 and MQTT.

DIY temperature guard

Temperature sensors are cheap and …

If you forget the root password (or a user password) of your WSL installation (Windows Subsystem for Linux), using the registry might help you. Because WSL is rather a lightweight kernel expansion than a full-featured VM, the typical live-CD trick (mounting the filesystem and running chroot) won't help.

Below the path …

In the last part of this series we checked-out and installed software for building our own voice assistant without leverage cloud resources. In this article we will focus on linking both Rhasspy and Node-RED. At the end, the assistant will learn it's first function.

Desired state

As we already know from the last …

Recently, I had to migrate a bigger amount of git repositories from one software to another provider. One requirement was to copy the whole project including commit history and tags. Fortunately, it was easy to automate this process.

First of all the former repository needs to be cloned - if not done, yet:

1$ git clone …

Docker has been supporting multiple processor architecture for a long time - including x86_64 and ARMv6/7 being the most well-known ones. In addition to them, aarch64/arm64 (ARMv8+), s390x (IBM z Systems) and ppc64le (IBM POWER) are also possible.

Images can be created for multiple architectures in a parallel manner …

To translate text into voice, a TTS software (Text-to-Speech) is required. Under Linux there are basically two free tools: CMU Flite and eSpeak.

CMU Flite (festival-lite) exists since 2001 and is therefore considered a veteran in speech synthesis under Linux, eSpeak was first released in 2006. From a sound perspective, …