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)

Find and Replace in VI or VIM

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To find and replace a string in VI or VIM you can use this command.

:%s/foo/bar/igc

How-To Find and Replace in multiply files on the command line

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Find and Replace in multiply files.

including a Back-Up

perl -pe "s/mouse/chicken/g" -i.bak $FILES;

Or no Back-up

perl -pe  "s/mouse/chicken/g" -i $FILES;

# -e execute this command
# -p loop over each line and print
# -i inplace edit, make a backup file

Log your running torrents

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Synposis

This is a solution for torrent downloaders with btdownloadcurses and the machines has to be rebooted. The script saves all running downloads every X minutes to a file. After reboot you can easily start the torrent-downloads again.

Summery

Converte Desktop recording file .ogv to mpeg format

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If you make a recording of your desktop using gtk-recordMyDesktop you get a screencast file in .ovg format. With memcoder you can convert that easy to a mpeg format using this command.

mencoder infile.ogv -oac lavc -ovc lavc -lavcopts abitrate=160 -o outfile.mpeg

How To Resize images with command line

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If you want to resize your photos it's simple to use resize tool in gThumb. Unfortunately gThumb deletes all the EXIF data like date and time the photo was taken.

To keep all EXIF data I use convert (from imagemagic)

find ./ -iname *.JPG" -maxdepth 0 -exec convert {} -resize 50% ./resized/{} \;


Fotografie

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.

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