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Sometimes you want to work on data sheets by using heirloom unic commands like cut, paste, sed, sort, wc and good old awk. But your user works on Microsoft Excel spreadsheet. The idea:
1) ask your user to save it as "Unicode Text" from Microsoft Excel and send the document to you;
2) use the given command to convert it to UTF-8 text. We carefully convert "\r\n" to local end-of-line character; and to convert "\n" (in Excel, means linebreak within the table cell") to "\r", which is carrier return but not end-of-line in Unix. If the "\n" is not replaced with "\r", for example, wc -l will report incorrect column number.
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