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Repeated lines-case sensitive

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# 1  
Old 04-20-2015
Tools Repeated lines-case sensitive
Hi, users file contains below names i have a requirement to keep only one case sensitive user. For e.g if user name is "aaa" then only aaa should be there in the file and other matching users(AAA,aaA) should be deleted.

Tried multiple options but no luck can you please help.


Code:
aaa
abc
AAA
aaA
aBC


thanks
satya
Last edited by Don Cragun; 04-20-2015 at 09:57 PM.. Reason: Add CODE tags, again.
# 2  
Old 04-20-2015
Try

Code:
awk '!A[tolower($0)]++' infile > outfile

Test
Code:
akshay@Aix:/tmp$ cat infile
aaa
abc
AAA
aaA
aBC

Code:
akshay@Aix:/tmp$ awk '!A[tolower($0)]++' infile
aaa
abc

# 3  
Old 04-21-2015
How do you tell which of the different spellings is the right one? A reference to /etc/passwd, for instance?
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