[ubuntu] dmtxwrite: help with the command

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http://ubuntuforums.org – Hi im pretty new to this, can someone help me with my Ubuntu problem? im trying to create a Datamatrix code using dmtxwrite but it doesnt work at all. i got qrencode to work and create a code out of text with this: qrencode -o qrtest.png -s 6 < qrtest.txt if i try the similar line with dmtxwrite I get: Usage: dmtx (OPTION) ... (FILE) dmtxwrite and its usage is here: http://manpages.ubuntu.com/manpages/...txwrite.1.html I know im a newb but could someone explain why I cant get it to work? (Hardware)