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Removing duplicate lines ignore case

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#1 (permalink)

12-01-2004

hellsd

Registered User

Join Date: Nov 2004

Posts: 20

Removing duplicate lines ignore case

hi,

I have the following input in file:
abc
ab
a
AB
b
c
a
C
B
When I use uniq -u file,the out put file is:
abc
ab
AB
c
v
B
C
b

Unfortunately, the uniq is not able to ignore case.

How can I check the file in order my output file will be:
abc
v

Thanks, Roy.

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