Month: April 2016

Convert avi to mp4 on Linux console

If you need a fast and easy way to convert an avi video – from a screen recording – to mp4 you can use this simple command:


How to check for the gem replacement vulnerability

Recent news about the gem replacement vulnerability made want to check all installed gems on my systems. The news states that gems that have not been updated since 8 February 2015 could possible be maninpulated. Keep in mind that this is a theoretical attack vector. As far as I understand no attack making use of this approach has occured.

As there is no onboard way to check which currently used gems have not been updated since Feb 8th, 2015 you need a small script for checking. I found one called check_gems.rb from David Cuadrado. It checks all gems installed on the system. more

The sad truth behind disruptive innovation

Everything in our modern western society is software based. What seemed impossible only 20 years ago is currently a part of our everyday lives. Software has taken over taxi services, classifieds, news consumption, movie and tv consumption, book delivery, cars, energy distribution, warfare, and many more.

A new term has emerged in software-based innovation that has transformed our western life style significantly: disruptive innovation. Disruptive innovation refers to situations where established businesses have been hit hard or completely destroyed by a new software driven solution. Common examples include Uber, Craigslist or Netflix.


The misconception that software has become simpler

Software becoming simpler is just an illusion. The opposite is true: software itself has become even more complicated over the past 20 years. Software nowadays consists of layer upon layer of software applications. Some of those layers are located in other geographical locations; and in those locations even more layers of the software exists. The main reason why most people think software has become simpler is because they only see the final layer on the top of all of the other layers. It is the shiny layer that has been created by skilled artists and polished by countless tests and interviews with target audiences. What people see when they start an app on their phone or tablet is just a tiny fraction of what this software actually consists of.