ETH supercomputing for beginners

Aug 25, 2015

Disclaimer: for this to work, you must be an ETH Zurich affiliated person and own a nethz-account . So, you wanna play around a bit with machine learning. Or run a crazy particle physics simulation. But you only have a lame Macbook. Your gaming rig would do the job, but its fans are spinning so loud your neighbors complained. Solution? Just use ETHs Euler general purpose super computer ! Even though they explicitely write that Euler is “not a supercomputer”, supercomputer just sounds cooler than “general purpose” computer. ...

Wifi monitor on a Raspberry Pi

Aug 1, 2015

I had a Raspberry Pi and an old analog volt meter lying around. To finally do something “useful” with it, it was decided that our CoWorking Space needs a WiFi detector. Functionality in short: It captures WiFi packets from the air, and counts them. This then gets mapped to a scale from 0 to 10, and displayed on a rainbow-colored LED chart. Hardware This runs on a Raspberry Pi Model B, although all the other models should work too. ...

Telegram CLI on Raspberry PI

May 11, 2015

Telegram is an (encrypted) messenger service which also offers an API. This makes it ideal for bots and automation. Here it is shown hot to set up telegram-cli on your Pi. Get a shell on your RasPi, I prefer to do this over SSH. You can also plug your RasPi to a screen and ann a keyboard. Build sudo apt-get install -y git sudo apt-get install -y libreadline-dev libconfig-dev libssl-dev lua5. ...

Migrating Gitlab from MySQL to Postgres

Apr 23, 2014

Recently, I migrated Apovedas Gitlab installation from using MySQL as database server to PostgreSQL. Thats because until now, I have used the manual gitlab setup guides, and I now want to change this to use the automatic setup/provided packages, which all use postgres. Install Postgres and create the database (Taken from the Gitlab installation manual ): sudo apt-get install -y postgresql postgresql-client libpq-dev # Login to PostgreSQL sudo -u postgres psql -d template1 # Create a user for GitLab. ...