June 30, 2024
Signing F-Droid Repository with (Yubi)HSM
How to sign an F-Droid repository with a hardware security module (HSM) like the YubiHSM.
Blog Archive
June 2024
January 2023
January 14, 2023
Some thoughts on the ETH's Threema Analysis
Some thoughts on the Threema analysis carried out by a research team at ETH Zürich.
November 2021
November 16, 2021
Signing Git Commits with SSH Keys
How to sign Git commits and tags with SSH keys.
December 2020
December 20, 2020
Breakpoints Not Working With VS Code + Rust + LLDB
How to fix breakpoints that don't work when debugging Rust code with LLDB in VS Code.
May 2020
May 16, 2020
Removing flash protection from the nRF52 using JLink + OpenOCD
How to remove nRF52 flash protection using a JLink debug probe and the OpenOCD software.
March 2020
March 16, 2020
Hydroponik: Eine Anleitung für Einsteiger
Eine kurze Einführung in Hydroponik, und wie man sich aus einer RAKO-Box selber einen Indoor-Garten bauen kann.
December 2019
December 24, 2019
Testing for no_std compatibility in Rust crates
How to avoid accidentally breaking no_std compatibility in Rust crates.
October 2019
October 05, 2019
Installing Debian on the PC Engines apu2
How to install Debian on the apu2 single board computer through the serial console.
February 2019
February 22, 2019
Die Qualität des Schweizer E-Voting-Programmcodes
Erläuterungen und Erklärungen zur aktuellen Kritik an der Qualität des Schweizer E-Voting-Programmcodes.
February 2019
February 03, 2019
Booting Systemd Based Linux without Graphical Interface
How to boot a sytemd based Linux without the graphical user interface.
December 2018
December 26, 2018
Converting GPX Waypoints for Skxtraxx Vario
How to convert waypoint files in GPX format for Skytraxx flight computers.
November 2018
November 09, 2018
Kommentar zu E-Voting Stellungnahme St. Gallen
A reply to a statement by the canton of St. Gallen in the context of Swiss E-Voting test runs (German).
August 2018
August 20, 2018
Read SHTC1/SHTC3 Sensor From Raspberry Pi
How to read a SHTC1 or SHTC3 temperature/humidity sensor from Linux.
April 2018
April 01, 2018
Weekly Driver: Using the SGP30 Gas Sensor from Rust
Announing the SGP30 Rust driver.
March 2018
March 13, 2018
Weekly Driver: Using the MCP3425 ADC from Rust
Announing the MCP3425 Rust driver.
September 2017
September 05, 2017
Creating a Custom TS100 Boot Logo with GIMP
How to create a boot logo for the TS100 soldering iron with GIMP.
August 2017
August 22, 2017
HC06 Serial Console via Bluetooth on Arch Linux
How to connect to a serial console via a HC06 bluetooth module.
June 2017
June 23, 2017
LoRaWAN Data Rates
Table of LoRaWAN data rates.
March 2017
March 10, 2017
How to Write a Collectd Plugin with Python
With Python, it's very easy to write generic plugins for collectd. Here's a tutorial on how to measure the Raspberry Pi CPU temperature using such a plugin.
February 2017
February 06, 2017
Read SHT21 Sensor From Raspberry Pi
How to read a SHT21 temperature/humidity sensor from Linux.
February 2017
February 03, 2017
Starting Docker Daemon on Demand with Socket Activation
How to start the Docker daemon on demand using systemd socket activation.
October 2016
October 09, 2016
Speeding Up Yaourt Package Installs
Speed up Yaourt package installs on Arch Linux by disabling compression.
July 2016
July 23, 2016
Dynamic DNS Updates on FreeDNS from RouterOS
Configuring automatic Dynamic DNS updates on freedns.afraid.org from a Mikrotik device.
June 2016
June 04, 2016
Fixing EFI Bootloader after Windows 10 Upgrade
How to fix the systemd-boot bootloader after upgrading Windows.
February 2016
February 18, 2016
Overriding Default Arguments in Python
How to override the default arguments of a function.
December 2015
December 01, 2015
Rustaceans: Please Keep a Changelog!
Please provide a changelog with your Rust crates.
May 2015
May 25, 2015
Rust: Implementing Methods on Builtins
Rust allows you to easily extend builtin types with your own methods.
May 2015
May 15, 2015
Programming a Perceptron in Rust
A simple perceptron implementation in Rust.
March 2015
March 30, 2015
Opbeat Release Tracking with Ansible
How to do proper release tracking on Opbeat with Ansible.
March 2015
March 24, 2015
Creating Django Oscar Initial Data Migration
How to create proper initial data migrations for django-oscar.
February 2015
February 19, 2015
Properly Defining SerializerMethodFields in DRF
How to solve an ImproperlyConfigured exception in Django Rest Framework related to improper use of the SerializerMethodField.
October 2014
October 30, 2014
Migrating from django-social-auth to python-social-auth
How to migrate from django-social-auth to python-social-auth.
September 2014
September 08, 2014
Profiling Pytest Tests
How to run pytest with cProfile.
August 2014
August 07, 2014
Viewing the Exim4 Mail Queue
How to list the exim4 mail queue and view the content of the queued mails.
June 2014
June 17, 2014
Setting the setuid / setgid Bit with Ansible
You can set the suid/sgid bit using the regular octal numeric chmod syntax.
May 2014
May 06, 2014
First Tests with the Micropython Board
Playing around with the Micropython board: First simple scripts.
April 2014
April 20, 2014
Scrolling Text with RPLCD
How to implement scrolling text using the RPLCD library for the Raspberry Pi.
April 2014
April 08, 2014
Store Settings on Logitech Z-5500
It is possible to store settings on the Logitech Z-5500 by cycling through the second skin.
April 2014
April 04, 2014
Broken Bones
Some stuff about my newly acquired radial implant. And nasty pictures.
February 2014
February 12, 2014
Down the Tweet Chain Rabbit Hole
An analysis of the "endless-chain-of-tweets" meme that became viral on Twitter this week.
February 2014
February 07, 2014
Creating a European Heroku PostgreSQL Database
How to create a Heroku PostgreSQL database on a european server.
January 2014
January 26, 2014
Using SSMTP with Fastmail
How to configure SSMTP for usage with Fastmail.
January 2014
January 14, 2014
Setting A Static IP with iproute2
How to set a static IP in Linux with the "ip" command.
January 2014
January 08, 2014
Improving Firefox SSL/TLS Security
How to improve Firefox SSL/TLS security by enabling TLS 1.2 and disabling insecure ciphersuites.
December 2013
December 21, 2013
Tangible – convert data into tangible 3D models
Tangible is a Python library to convert data into tangible 3D models.
November 2013
November 10, 2013
Fetch Current Bitcoin Price with Python
How to get the current Bitcoin price from MtGox using Python.
October 2013
October 04, 2013
Schedule Weekly or Monthly Tasks on Heroku
You can schedule weekly or monthly job on Heroku Scheduler using a nice little trick.
September 2013
September 26, 2013
Plot Registered Django Users with Matplotlib
How to plot registered Django users using matplotlib.
August 2013
August 14, 2013
Merging Multiple PDFs under GNU/Linux
There are different ways to merge multiple PDF files under GNU/Linux.
June 2013
June 18, 2013
Heroku Buildpack for Numpy, Scipy and Scikit-Learn
I created a buildpack that brings support for Numpy, Scipy and Scikit-learn to Heroku.
May 2013
May 27, 2013
Using Jedi with YouCompleteMe
How to use Jedi with the YouCompleteMe library.
May 2013
May 25, 2013
PHP-FPM and Nginx Upstream Configuration
Current versions of php5-fpm from dotdeb listen on a unix domain socket by default, instead of using port 9000.
May 2013
May 16, 2013
ufw – A Simple iptables Frontend
ufw is a very easy way to configure your firewall rules, without writing iptables scripts.
May 2013
May 10, 2013
Enums in Python
Python 3.4 will introduce a builtin enumeration type. But you can already start using it right now.
April 2013
April 26, 2013
List Outdated Dependencies with Pip
Version 1.3 of pip makes it possible to list outdated packages.
March 2013
March 27, 2013
Testing Dajaxice Views in Django
How to test Dajaxice views using the Django test client.
March 2013
March 26, 2013
Programming a Perceptron in Python
How to create a simple perceptron using Python and NumPy.
March 2013
March 08, 2013
d3.js and X-Requested-With
How to make AJAX detection used by Django and Flask work with d3.js.
February 2013
February 07, 2013
Git Introduction Presentation Slides
The slides of a presentation I held about git.
January 2013
January 29, 2013
Cut Videos from Bash with ffmpeg
How to cut a video in your terminal.
December 2012
December 07, 2012
Set a Random Wallpaper from Bash
How to set a random wallpaper from a directory on bash using feh.
October 2012
October 23, 2012
Recompile Vim with Python/Ruby Support on Arch Linux
Recompile Vim with Python and Ruby support under Arch Linux.
September 2012
September 18, 2012
Virtualenv Quickstart Guide
A short virtualenv quickstart guide.
August 2012
August 27, 2012
Debian Squeeze Update breaks Redmine 1.1.2
How to fix Redmine breakage due to updates on Debian Squeeze.
July 2012
July 29, 2012
Mail Loop From Hell
One of those awesome 90ies computer stories...
July 2012
July 08, 2012
Marking South migrations as new
How to mark some South migrations as new.
June 2012
June 15, 2012
Using tsql
How to use the tsql command.
June 2012
June 11, 2012
Goodbye Wordpress, hi rstblog!
I just replaced Wordpress with rstblog.
February 2012
February 21, 2012
Ubuntu / Redmine / Nginx / Mongrel / Supervisord
How to install Redmine on Ubuntu with Nginx, Mongrel and Supervisord.
January 2012
January 22, 2012
phpBB Soundcloud Embed BBCode
How to create a Soundcloud embed BBcode.
January 2012
January 19, 2012
dwm config - volume, battery notification, unread e-mail count & more
My dwm configuration.
December 2011
December 19, 2011
django-sphinx sorting
How to sort a SphinxSearch instance.
November 2011
November 21, 2011
jQuery On-Off Toggle/Switch
On-Off switches with HTML, CSS and jQuery.
September 2011
September 12, 2011
Django Forms with Multiple Inheritance
How to validate Django forms in a DRY way using multiple inheritance.
September 2011
September 01, 2011
dwm ssh/screen/irssi notifications
Show notifications for irssi mentions inside a ssh screen session on dwm.
August 2011
August 23, 2011
Google Plus – Inspired by Diaspora?
After all the buzz around Google+, one of its competitors, Diaspora (free and open source …
April 2011
April 09, 2011
Show MySQL Storage Engines
If you have ever wanted to know the storage engine type of every table in …
April 2011
April 01, 2011
1. April 2011
Hier ein paar der Aprilscherze 2011: DayDeal: DIY Lego-Haus (screenshot) XKCD: Alle Comics in 3D …
March 2011
March 31, 2011
Install Android Development Environment under Arch Linux
How to install Eclipse and the Android Developer Tools under ArchLinux x64: sudo pacman -S …
February 2011
February 26, 2011
Order confirmation - the CD Baby way
I just received a pretty dang awesome confirmation-email for a CD order at CD Baby …
February 2011
February 22, 2011
A simple LaTeX Makefile
Today I created a simple LaTeX Makefile based on this tutorial. First of all, this …
January 2011
January 30, 2011
Der Bloggerfilm / Einfluss von Twitter auf Blogging
Film Heute erst entdeckt: Der Bloggerfilm. Michael Eugster hat im Rahmen seiner Maturaarbeit eine kurze …
January 2011
January 13, 2011
Arduino Documentary
I recently found a great documentary on Vimeo about the Arduino project. Highly recommended to …
January 2011
January 08, 2011
Install Brother DCP-7010 under Arch Linux
This how-to will enable you to print and scan with a Brother DCP-7010 printer under …
January 2011
January 07, 2011
Update file type associations under Linux
To update a file type (or rather a mime type) association under Linux, you can …
November 2010
November 18, 2010
Use easy_install under Arch Linux or Ubuntu
If you want to use Python's easy_install, you need to install an additional package …
November 2010
November 16, 2010
Tips for using Ubuntu with dwm
Some useful tips for using the dwm window manager on Ubuntu: GDM / Booting To disable …
November 2010
November 15, 2010
Slock Logging Patch
I love slock, a simple screenlocker written for dwm, but I was missing some logging …
October 2010
October 06, 2010
Fingerprint Reader with Thinkpad T410 using Ubuntu
How to add fingerprint reader support to your Ubuntu installation (yes, it does work): Add …
October 2010
October 05, 2010
Gustave Doré - Free Kindle Screensaver Images
With the "Jailbreak" for the Kindle 3, you also have the possibility to exchange the …
September 2010
September 04, 2010
Why some software project websites suck and others don't
What distinguishes a good software project website from a bad software project website.
August 2010
August 31, 2010
Medienwandel in der Schweiz
Ein sehr interessantes und super gemachtes Video zum Thema "Medienwandel in der Schweiz": Genau aus …
July 2010
July 14, 2010
tutorial: How to use MPX to control several mouse pointers at the same time
The MPX project is a Xorg extension to allow several mouse pointers and keyboards in …
July 2010
July 14, 2010
Vimeo Picks 2
Hier die Fortsetzung der Serie...
June 2010
June 28, 2010
Create 30-sec soundsamples with SoX
To create 30-second sound samples (e.g. for audio previews of songs) from existing tracks …
June 2010
June 18, 2010
Change MySQL Database Encoding
To change MySQL table column encoding: ALTER TABLE artists CHANGE [fieldname] [fieldname] [fieldtype] CHARACTER SET …
June 2010
June 18, 2010
Fight Wordpress spam effectively
My solution to stop wordpress comment spam is a combination of three Wordpress plugins: Akismet …
May 2010
May 21, 2010
Fix Ubuntu user directories (Desktop/Music/Templates etc)
If you accidentally deleted one of your Ubuntu user directories (like Desktop, Music, Pictures, Templates …
May 2010
May 14, 2010
Ubuntu Lucid - fix theme
After upgrading to Ubuntu Lucid, I didn't like some aspects of the new theme (Ambiance …
March 2010
March 19, 2010
SMB vs NFS speed
Copying a 3.2GB MKV movie file from my local hard drive to a Synology …
March 2010
March 18, 2010
Change Linux UID/GID
Log in with another user than the one to be edited or reboot into recovery …
February 2010
February 25, 2010
Platzfresser in der Linux Shell finden
Um in der Linux Shell die 10 grössten Platzfresser im aktuellen Verzeichnis zu finden, füge …
February 2010
February 22, 2010
Play Rayman 1 on Linux using DosBox
This is a tutorial to install and play Rayman 1 (the greatest jump'n'run game ever …
February 2010
February 16, 2010
Rkhunter Application Warnings on Debian
On my (up to date) Debian Lenny installation, rkhunter regularly complains that various applications are …
January 2010
January 04, 2010
XKCD's impact on Google searches
"Autoerotic Asphyxiation" "Men kissing" "Died in a blogging accident" "I should have kissed him" "0 …
January 2010
January 03, 2010
Ubuntu 9.10 "Karmic Koala" watch encrypted DVD
In my Ubuntu 9.10 "Karmic Koala" installation, I wasn't able to watch a DVD …
November 2009
November 09, 2009
error 0x80300001
If error 0x80300001 occurs during XP/Vista/Windows7 installation, check whether the installation DVD is …
October 2009
October 21, 2009
Heavy Metal hat etwas urkomisches
Ich finde, Heavy Metal hat etwas Urkomisches. Das dachte ich vielleicht mit 14 noch nicht …
October 2009
October 16, 2009
Kaffee Nachfüllen
Dank rouge bin ich auf ein lustiges Script gestossen, welches ich natürlich gleich auf unserem …
September 2009
September 25, 2009
Vimeo Picks 1
Ich hab heut Abend wiedermal einige Zeit auf Vimeo verbracht. Vimeo ist eine Video-Platform, die …
September 2009
September 15, 2009
ARPANET History
That's how the internet – or actually the ARPANET – looked in 1969. And this is the …
September 2009
September 01, 2009
Integrate Dokuwiki with SMF
I recently needed an integration of Dokuwiki with SMF (Simple Machines Forum). After some research …
September 2009
September 01, 2009
List Available Kernel Modules
To list all available linux kernel modules, issue as root: $ find /lib/modules// -type f …
August 2009
August 17, 2009
Show MySQL Database Encoding
To get the current mysql database encoding, issue the following sql query: SHOW VARIABLES LIKE …
August 2009
August 12, 2009
Edit Bash command in $EDITOR
To edit the current command in Linux Bash in your default editor ($EDITOR), use the …
August 2009
August 10, 2009
Wahrheit
(...) Die Partei sagte, dass Ozeanien sich nie mit Eurasien verbündet hatte. Er, Winston Smith, wusste …
August 2009
August 06, 2009
Enable Ctr+Alt+Backspace in Ubuntu Jaunty
To re-enable the ctrl+alt+backspace key combination in Ubuntu Jaunty, add this code to …
July 2009
July 06, 2009
Ghana: Digital Dumping Ground
The effects of e-waste on the third world.
June 2009
June 25, 2009
Unix write as normal user
In case you get a "Permission denied" when trying to use the write command as …
June 2009
June 23, 2009
Website Checkliste
Eine kleine, spontane Checkliste, damit man nicht nach der Fertigstellung einer Website einige dieser häufig …
June 2009
June 16, 2009
Storing an IP in MySQL
Summary Datatype:int(4) unsigned Storing IP:INET_ATON('192.168.1.39') Getting IP …
June 2009
June 16, 2009
Transfer SVN Repository
To transfer an SVN repository from one server to another one, first dump the repo …
June 2009
June 14, 2009
var_dump with JavaScript
In case you miss var_dump or print_r functions in Javascript, here's a solution …
May 2009
May 27, 2009
Oracle 10g Client Fehlermeldungen
Wenn folgende Fehlermeldung beim Verbinden auf die Datenbank erscheint: ORA-00604: Fehler auf rekursiver SQL-Ebene 1 …
April 2009
April 28, 2009
RubyGems Update Problems
Getting the following error message when trying to use rake? undefined method `loaded_specs' for …
April 2009
April 23, 2009
Slow Motion vs Timelapse
Slow... And fast...
April 2009
April 14, 2009
Third Culture Kids
Wenn ich nach meiner Nationalität oder Herkunft gefragt werde, gebe ich normalerweise der Einfachheit halber …
April 2009
April 06, 2009
Künstler verletzt seine eigenen Rechte
Jetzt richtet sich das Urheberrecht schon gegen die Urheberrechtsinhaber selber... Wo soll das alles noch …
March 2009
March 29, 2009
Unvollständiges CH-Tastaturlayout
Seit Tagen hatte ich unter Gentoo einen nervigen Bug - das Schweizer Tastaturlayout unter Xorg funktionierte …
March 2009
March 20, 2009
Sync Portage without rsync
Want to get the newest Portage tree, but can't use emerge --sync because rsync traffic …
March 2009
March 11, 2009
Make Apache Less Talkative
On a standard installation of Apache, the webserver sends a lot of information about installed …
March 2009
March 06, 2009
Vmware Symbol Lookup Error
Despite the fact that the Vmware Player was working two weeks ago, today it didn't …
February 2009
February 25, 2009
Prozess um 'The Pirate Bay'
Der Bericht über den Prozesstag 7 auf Gulli übertrifft wiedermal alles. Ich kann nur empfehlen …
February 2009
February 22, 2009
EOS 450D Remote Trigger
On the left side of the Canon EOS 450D (and probably on any other EOS …
January 2009
January 27, 2009
XML Deklaration in PHP Datei
Wer schonmal eine XML-Deklaration in einer PHP-Datei ausserhalb der PHP Tags () gemacht hat, weiss …
January 2009
January 26, 2009
Eclipse + Xulrunner
When emerging eclipse-sdk-3.2.1 under gentoo (or maybe also on other distributions), you may …
January 2009
January 20, 2009
Windows Update Error 8000FFFF
Nach zwei Tagen Kampf mit der Installation des neuen Visual Studio 2008 unter Windows Vista …
December 2008
December 10, 2008
HTML Umbrechen mit VIM
Unser CMS am Arbeitsplatz hat irgend einen Bug, der bewirkt, dass die Codeansicht von Artikeln …
December 2008
December 03, 2008
Mediawiki PW-Reset per MySQL
Soeben musste ich mein Mediawiki Passwort resetten, hatte aber im Profil keine Mailadresse angegeben. Dank …
November 2008
November 20, 2008
Farbschema-Generator
Wer häufig mit Webdesign oder sonstigen gestalterischen Aufgaben zu tun hat, sollte sich mal den …
October 2008
October 22, 2008
Der Wert von Linux
Laut Berechnungen der Linux Foundation liegt der Wert einer heutigen Linux-Distribution bei etwa 10.8 …
October 2008
October 01, 2008
The Dangers of Open Source
When you're programming open source, you're programming communism! Be warned!
September 2008
September 08, 2008
RipIT
Geht es euch auch manchmal so? Ihr benutzt diverse Programme für einen bestimmten Zweck, und …
August 2008
August 11, 2008
file2hd.com
Einen sehr praktischen Service bietet das Onlinetool file2hd.com an. Einfach URL von einer Webseite …
July 2008
July 16, 2008
Einfügen in Vim
Häufig finde ich auf einer Website Codestücke und will die in Vim einfügen. Jedoch passiert …
May 2008
May 09, 2008
Demoscene
Mal ein paar Sachen aus der Demoscene... Ein Arbeitskollege hat mich darauf aufmerksam gemacht. Was …
March 2008
March 18, 2008
PSPad VBS Plugin
In der Schule arbeiten wir momentan mit VBScript. Mein bevorzugter Editor ist PSPad (sehr empfehlenswert …
March 2008
March 12, 2008
Firewall umgehen mit SSH
Wer kennt das nicht? Im Büro, in der Schule, oder sonstwo sind bestimmte Firewallports gesperrt …