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Code QR
Des outils on-line pour générer un QRCode
http://www.morovia.com/free-online-barcode-generator/qrcode-maker.php
qrencode
sudo apt-get install qrencode
qrencode - Encode input data in a QR Code and save as a PNG image.
EXAMPLES
qrencode -l L -v 1 -o output.png 'Hello, world!'
encode into a symbol version 1, level L.
qrencode -iSv 1 –output=output.png
read standard input and encode it into a structured-appended symbols in case-insensitive mode.