Module assessment

1.

In our current directory, we want to find the three files with the least number of lines. Which command would work?

wc -l * > sort -n > head -n 3

wc -l * | sort -n | head -n 1-3

wc -l * | sort -n | head -n 3

wc -l * | head -n 3 | sort -n

2.

What will the regular expression Fr[ea]nc[eh] match?

French, France, Frence, Franch

Frenche, Franceh, Frenceh, Franche

France, French

Freanceh, Fraenche

3.

The -v option to the grep command inverts pattern matching so that only lines that don't match the pattern are printed. Which of the following commands finds all files in the /data directory whose names end in s.txt, but whose names also don't contain the string net? Examples are shuttles.txt or software.txt, but not planets.txt.

find data -name *s.txt | grep -v net

grep -v 'net' $(find data -name '*s.txt')

find data -name '*s.txt' | grep -v net

None of these commands

4.

Suppose you want to delete some processed data files and save storage by only keeping your raw files and processing script. The raw files end in .dat, and the processed files end in .txt. Which of the following solutions would remove all of the processed data files, and no other files?

rm ?.txt

rm *.txt

rm * .txt

rm *.*

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