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

necroman08 · July 17, 2009, 4:32am

Input:

a
b
b
c
d
d

I need:

a
c

I know how to get this (the lines that have duplicates) :
b
d

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.

lathavim · July 17, 2009, 4:43am

 
sort file | uniq -u

rakeshawasthi · July 17, 2009, 4:47am

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
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 ----------

This works though

necroman08 · July 17, 2009, 5:07am

Yea sorry. Wrote it wrongly, it should be:

sort file | unig -d

.
Wrote rubbish first time, that is because stres

---------- Post updated at 04:07 AM ---------- Previous update was at 04:05 AM ----------

Great! Thanks man.