Sorting multiple keys with Unix sort

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Take care though:

If you want to sort the file primarily by field 3, and secondarily by field 2 you want this:

sort -k 3,3 -k 2,2 < inputfile

Not this: sort -k 3 -k 2 < inputfile which sorts the file by the string from the beginning of field 3 to the end of line (which is potentially unique).

-k, --key=POS1[,POS2]     start a key at POS1 (origin 1), end it at POS2
                          (default end of line)

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