Prepending character N followed by line numbers

Posted by Denis on Stack Overflow See other posts from Stack Overflow or by Denis
Published on 2010-04-19T20:33:11Z Indexed on 2010/04/20 0:43 UTC
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Hi, I'm hand editing CNC Gcode text files and need a way to reference locations in the file and on the toolpath. I want to modify each line in the text file so that it begins with the the upper case N character followed by line numbers which increment in tens for every successive line, then a whitespace,followed by the original text file. Can I do this in vi?

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