Uniq
Report or filter out repeated lines in a file.
주의사항
정렬이 되었다는 전제로 사용해야 한다.
Options
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-c - Precede each output line with the count of the number of times the line occurred in the input, followed by a single space.
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-d - Only output lines that are repeated in the input.
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-u - Only output lines that are not repeated in the input.
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-f num - Ignore the first num fields in each input line when doing comparisons.
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-i - Case insensitive comparison of lines.
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-s chars - Ignore the first chars characters in each input line when doing comparisons.
Examples
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sort yourfile.txt | uniq -d - 중복되는 라인만 출력
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sort yourfile.txt | uniq -u - 중복되지 않는 라인만 출력