WalkTracker – Android application

This application will track your walks and store them on the device. It arose from own needs to track walks without the need to create an external account or link it with for example Facebook. Nevertheless you can share your track using Facebook if you like or send it via e-mail to yourself or friends. …

Dynamic public IP-address / Call – Home

Assume you do have a computer connected to the Internet which obtains it’s public IP-address dynamicly. Some providers like 1und1 in Germany require that the xDSL line is reset every day at least one time. At that moment you obtain a new IP-address from a pool of addresses. Privacy This dynamic IP-address is great if …

Raspberry Pi: Your cheap Automatic Identification System (AIS) receiver

In this tutorial you will learn how to teach your Raspberry Pi to become a brave Automatic Identification System (AIS) receiver. What is AIS? The Automatic Identification System (AIS) is an automatic tracking system used on/for ships. It transmits information like identification, position, course and speed. Ingredients Raspberry Pi (2 model B) DVB-T-DAB-FM receiver Client …

Parallel bash scripts – waiting for completion

Assume we would like to execute several independent tasks in parallel and we would like to wait till these tasks are completed. For example we would like to copy a set of files to several (remote) hosts and get a signal when we are ready with this copying task to ALL hosts so we can …