I have a file the contains
apple
apple
banana
orange
apple
orange
I want a script that finds the duplicates apple and orange and tells the user that the following : apple and orange are repeated. I tried
nawk '!x[$1]++' FS="," filename
to find repeated item so how can i print them out in unix bash ?
In order to print the duplicate lines, you can say:
$ sort filename | uniq -d
apple
orange
If you want to print the count as well, supply the -c
option to uniq
:
$ sort filename | uniq -dc
3 apple
2 orange
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