1

I have an input file with foillowing data:

line1
line2
line3
begin
line5
line6
line7
end
line9
line1
line3

I am trying to find all the duplicate lines , I tried 

sort filename | uniq -c

but does not seem to be working for me :

It gives me :

  1 begin
  1 end
  1 line1
  1 line1
  1 line2
  1 line3
  1 line3
  1 line5
  1 line6
  1 line7
  1 line9

the question may seem duplicate as Find duplicate lines in a file and count how many time each line was duplicated? but nature of input data is different .

Please suggest .

Community
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Vicky
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    If I try to reproduce your problem, I get lines like `2 line3`, so probably there is a problem with spacing after `line1` etc in the source file. – Willem Van Onsem Jan 09 '17 at 12:24
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    Thanks Will there was a spacing problem indeed , I removed the space and result is OK – Vicky Jan 09 '17 at 12:29

1 Answers1

3

use this:

sort filename | uniq -d
man uniq
Angel Bochev
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