Welcome to Rob Groen's website

The Internet Jigsaw

Internet and internet systems are like one big jigsaw. Every piece has to be on the right place. If just one piece isn't right than you won't get the result you hoped for.

E-commerce specialist

I am a E-commerce specialist and can help you with many questions about this fantastic way of selling you products or services. In the late '90 I started a web shop for selling white-goods over the Internet on the Dutch marked. I was the first one who did that and there was no software like Drupal of OS-Commerce. I had to invent it all by myself. It was a great time!.
The shop was very successful and some day a big company made me an offer that I couldn't refuse. So I sold my e-commerce business.

Now I use my knowledge to advice and help other e-commerce companies to get better, grow and make more profit. My strength is the combination between technique and commerce.

Linux specialist

I am a Linux specialist and work with Linux since 1997. I am using mainly Debian based distributions like Debian and Ubuntu.
Please let me help you to find the pieces you need and how to stuck them together.Visit my Linux Tips & Trick page to see some helpful solutions.

Scheveningen Luxemburg Scheveningen

Classic SLS Rally

Since 1995 I drive with the technical service and repair group in the Classic SLS Rally. this Rally is for old car dated before 1975 and they drive from Scheveningen, a famous city on the west coast from The Netherlands, to downtown Luxembourg city and back again.

The rally includes 2 nightly stays in Belgium.

SLS Rally Medaille

Portfolio overview

A overview with some of my website projects. I prefer building websites in Drupal, Joomla and OS-Commerce.

Latest Tips & Tricks

My latests solutions for Linux software problems.
(English Only)

Colors are mangled in Natty

After a fresh install of Firefox and THunderbird on Ubuntu Natty the colors of indexed images and icons are mangled.

Jena said on this page http://ubuntuforums.org/showthread.php?t=1742738

Re: (some) colors shifted after Natty upgrade
Also, I checked on another computer - the screenshots I posted above are accurate. Those are really the colors it shows.

rsync cannot delete non-empty directory

I had a rsync backup script that suddenly came with the error message:
cannot delete non-empty directory

This reason why this error occurs is that a dir is deleted or renamed on the source AND you are using the option --exclude.

The solution is to add the option --delete-excluded.

As the manuals says:
--delete-excluded also delete excluded files from dest dirs

Download a Youtube video and rip the audio


Suppose you want the audio track from a YouTube video.
This is how you do that.

Linux command to download a flv YouTube video


Now rip the audio from the flv file

mplayer -dumpaudio file.flv -dumpfile file.mp3

Damn...I like Linux :)

How To Get rid of the redirect in search result Google to Gomeo website

One of my client notified that when she clicked on the Google search results she was re-directed to a other website than mentioned in the results. Al redirects went to the website http://www.gomeo.com/

I noticed that not all click on the links where re-directed to Gomeo. Two out of three click where redirected to Gomeo while the other click landed on the correct page.


Fotografie is al sinds mijn jeugd een hobby. In de jaren '70 fotografeerde ik met een 2-hands grootbeeld spiegelreflex camera. Echt een oudje en ondanks zijn leeftijd een prima camera. Dat was in die tijd normaal dat je naast je camera ook een aparte, losse belichtingsmeter bij je had. Immers met de camera kon je niets ander dan scherpstellen, de sluitertijd en het diafragma instellen.