Computing with Data

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Bash - Pipes

The following example shows a piped combination of the echo command, and the wc command, which prints the number of lines, words, and characters in its input:

echo a sentence with 8 words and 42 characters
# count lines, words, characters in the following sentence
echo a sentence with 8 words and 42 characters | wc
# feed the output of the piped combination above to another wc command
echo a sentence with 8 words and 42 characters | wc | wc
# and so on
echo a sentence with 8 words and 42 characters | wc | wc | wc

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