Skip to main content


Showing posts from 2017

El Lean Canvas, explicado paso a paso

Tengo el honor de ser profesor del curso Startup Innovation Lab , del Plan de Empleo para la Educación Superior , en el que jóvenes canarios en situación de desempleo descubren las principales técnicas de emprendimiento siguiendo la metodología Lean Startup . Dado que no hay muchos ejemplos prácticos y en español sobre cómo completar el Lean Canvas , he creado un vídeo de 14 minutos en el que se explica, paso a paso, cómo completar el canvas utilizando Spotify como producto de ejemplo. Éste es el canvas resultante. Espero que sea de utilidad al igual que lo está siendo para mis alumnos.

Want to be more productive at work? Leave your smartphone at home

I never considered myself a smartphone addict, but it is true that I waste a lot of time checking my phone and responding to personal emails and messages. According to studies  [1]  and [2] , the average user checks the smartphone 80 times per day  for 2.42 hours  and touches the display 5427 times per day . These figures might seem very high, but I tracked my smartphone usage with BreakFree for one week and they are surprisingly accurate. A couple of years ago I started using the Pomodoro Technique  at work, which  blocks smartphone notifications and some websites during the work intervals (25 minutes) and allows you to check them during the scheduled breaks (5 minutes after each work interval). This really helped me be more productive but it requires self-discipline that sometimes I don't have. What if you really can't check your smartphone, personal email or social media because you don't have access to it? A few weeks ago I started the following experiment:

Bypass blocked ports with Reverse SSH Tunneling

Most organisations have security rules that stop non-standard ports on external resources from being accessed from the corporate network. One frequent scenario is when you are running a website on a non-standard port (e.g., 5000 ) on AWS EC2 (e.g., )  and you try to call it from your corporate network. In most cases, if you open your browser and try to access http:// :5000 ,  the site won't load despite having the port open on AWS EC2 Security Group . To overcome this limitation you can use Reverse SSH Tunneling the following way: Open a terminal and navigate to the folder where you have your PEM key to connect to AWS EC2 Type  ssh -i your_key.pem -NL LOCAL_PORT:localhost:REMOTE_PORT ( e.g.,  ssh -i your_key.pem -NL 8080:localhost:5000 ec2-user@ ). Leave the terminal open with the SSH command running. Open on your browser and type http://localhost:LOCAL_PORT (e.g., http://localhost:8080 ). The website wi