Sort and count number of occurrence of lines
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 …
What is the difference between "sort -u" and "sort | uniq"?
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 …
How to get only the unique results without having to sort data?
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 …
How to print only the duplicate values from a text file?
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 not need to …
pipe to uniq from a variable not showing the desired output
Feb 10, 2025 · I have a pipeline using array jobs and need to change the number of inputs for some steps. I thought about testing uniq since the only part changing in my folders are the last four …
What is the point of uniq -u and what does it do? [duplicate]
Nov 17, 2020 · uniq seems to do something different than uniq -u, even though the description for both is "only unique lines". What's the difference here, what do they do?
Difference between cat file.txt | sort -u and cat file.txt | uniq
Aug 25, 2019 · 5 Strictly speaking, uniq doesn't need sorted input - but it is true that uniq will only remove consecutive duplicate lines. The difference is that: sort sorts a file and (using its -u option) …
uniq - finding all non-unique lines in a file - Unix & Linux Stack Exchange
Nov 7, 2019 · 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 …
Why doesn't "uniq --unique" remove all duplicate lines?
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 …
Difference between using `sort -u` and `sort | uniq -u`
Sep 25, 2017 · The title and the body ask two different questions. sort | uniq is the same as sort -u, and sort | uniq -u is explicitly asking for a totally different behaviour; which one do you care about?