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Get correct number of lines in diff output

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linux-howto

http://unix.stackexchange.com – I want to get the correct number of lines in the output of diff(specifically with -y and --suppress-common-lines options). Using a simple wc -l does not work, because if both files end without a newline and their last line is different wc -l wont count the last line. Is there a simple and efficient solution to avoid this? For example, if you have files "a": a b c d #no newline here And "b": a b c D #no newline here The output is: $ diff -y --suppress-common-lines a b | wc -l 0 Which is obviously incorrect since diff does output a line. (HowTos)