Write a command that will output the sorted contents of a file named in.txt and

Write a command that will output the sorted contents of a file named in.txt and place the output in another file named out.txt, while at the same time excluding duplicate entries.

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Write a command that will output the sorted contents of a file named in.txt and place the output in ..

Answer / marigold

sort in.txt | uniq - d > out.txt

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