wc(1) - print newline, word, and byte counts for each file
Print newline, word, and byte counts for each FILE,
and a total line if more than one FILE is specified.
With no FILE, or when FILE is -, read standard input.
A word is a non-zero-length sequence of characters
delimited by white space. The options below may be
used to select which counts are printed, always in the
following order: newline, word, character, byte, maximum
line length.
-l, --lines
print the newline counts