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56 One difference is that uniq has a number of useful additional options, such as skipping fields for comparison and counting the number of repetitions of a value. sort 's -u flag only implements the functionality of ...
Nov 26, 2014 · uniq options: -c, --count prefix lines by the number of occurrences sort options: -n, --numeric-sort compare according to string numerical value -r, --reverse reverse the result of comparisons In the pa...
May 30, 2022 · The question is: is the output of sort -u |wc the same as uniq -u |wc? Because they don't yield the same results. The manual for uniq specifies: -u, --unique only print unique lines My output consists o...
62 $ cat data.txt aaaaaa aaaaaa cccccc aaaaaa aaaaaa bbbbbb $ cat data.txt | uniq aaaaaa cccccc aaaaaa bbbbbb $ cat data.txt | sort | uniq aaaaaa bbbbbb cccccc $ The result that I need is to display all the lines from...
2 I'm trying to use uniq to find all non-unique lines in a file. By non-unique, I mean any line that I have already seen on the previous line. I thought that the "-D" option would do this: -D print all duplicate lines...
Oct 28, 2021 · The output of uniq is then passed to grep and used as a series of regular expressions to search for in the input file. This solution will likely break if your input file contains certain regular express...
Jul 16, 2021 · uniq requires the input to be sorted (from man uniq) if you want it to remove all duplicate lines: DESCRIPTION Filter adjacent matching lines from INPUT (or standard input), writing to OUTPUT (or standa...
You can use uniq(1) for this if the file is sorted: uniq -d file.txt If the file is not sorted, run it through sort(1) first: sort file.txt | uniq -d This will print out the duplicates only. Technically the input does...
Mar 22, 2011 · Is there some better solution for printing unique lines other than a combination of sort and uniq?
Mar 30, 2015 · The uniq is in awk typically accomplished by saving the "unique data element or key" in an associative array and checking whether new data need to be memorized.
