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How to delete lines in a file that have duplicates or derive the lines that aper once

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# 1  
Old 07-17-2009
How to delete lines in a file that have duplicates or derive the lines that aper once
Input:
Code:
a
b
b
c
d
d

I need:
Code:
a
c

I know how to get this (the lines that have duplicates) :
b
d
Code:
sort file | uniq -d

But i need opossite of this. I have searched the forum and other places as well, but have found solution for everything except this variant of the problem.
Last edited by Yogesh Sawant; 07-17-2009 at 07:00 AM.. Reason: adde code tags
# 2  
Old 07-17-2009
Code:
 
sort file | uniq -u

# 3  
Old 07-17-2009
Quote:
Originally Posted by necroman08
Input:
a
b
b
c
d
d

I need:
a
c

I know how to get this (the lines that have duplicates) :
b
d
Code:
sort file | uniq e



But i need opossite of this. I have searched the forum and other places as well, but have found solution for everything except this variant of the problem.

doesn't work for me.... If you can make it work... using grep the other thing is possible.

---------- Post updated at 02:17 PM ---------- Previous update was at 02:16 PM ----------
Quote:
Originally Posted by lathavim
Code:
 
sort file | uniq -u

This works though
# 4  
Old 07-17-2009
Quote:
Originally Posted by rakeshawasthi
doesn't work for me.... If you can make it work... using grep the other thing is possible.

---------- Post updated at 02:17 PM ---------- Previous update was at 02:16 PM ----------



This works though
Yea sorry. Wrote it wrongly, it should be:
Code:
sort file | unig -d

.
Wrote rubbish first time, that is because stres Image

---------- Post updated at 04:07 AM ---------- Previous update was at 04:05 AM ----------
Quote:
Originally Posted by lathavim
Code:
 
sort file | uniq -u

Great! Thanks man.
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