How can I count the records in a file?

The command wc (short for "word count") prints the number of characters, words, and lines in a file. You can make it print only one of these using -c, -w, or -l respectively.

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Count how many records in seasonal/spring.csv have dates in July 2017 (2017-07).

To do this, use grep with a partial date to select the lines and pipe this result into wc with an appropriate flag to count the lines.

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