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sort uniq first (#954) 

'uniq' does not detect repeated lines unless they are adjacent, so we need to sort them
waldyrious/alt-syntax
Alfred Bez 2016-07-15 13:18:37 +02:00 committed by Leandro Ostera
parent 30c40feaa1
commit 8336898ea9
1 changed files with 6 additions and 5 deletions
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pages/common/uniq.md
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@ -1,23 +1,24 @@
# uniq
> Output the unique lines from the given input or file.
> Since it does not detect repeated lines unless they are adjacent, we need to sort them first.
- Display each line once:
`uniq {{file}}`
`sort {{file}} | uniq`
- Display only unique lines:
`uniq -u {{file}}`
`sort {{file}} | uniq -u`
- Display only duplicate lines:
`uniq -d {{file}}`
`sort {{file}} | uniq -d`
- Display number of occurences of each line along with that line:
`uniq -c {{file}}`
`sort {{file}} | uniq -c`
- Display number of occurences of each line, sorted by the most frequent:
`uniq -c {{file}} | sort -nr`
`sort {{file}} | uniq -c | sort -nr`