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Upper case letter match

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# 1  
Old 04-23-2013
Upper case letter match
Hi,
im able to search for string in a file (
HTML Code:
ex: grep -w "$a" input.txt
). but i have to search for the uppercase of a string in a file where upper case of the file content matches something like below.
HTML Code:
where upper("$a")== converted to upper case string in (input.txt)
can someone please provide the command
# 2  
Old 04-23-2013
Can you use "grep -i" (ignore case)?

Or are you trying to convert $a to uppercase form before doing the grep?
# 3  
Old 04-23-2013
Can you please elucidate the Question @ Satyambabu
# 4  
Old 04-23-2013
suppose input.txt has below data


input.txt
---------
38Nhava


grep -i 'nhava' input.txt will return the result though i just grepped for a sub string.

grep -w '38Nhava' input.txt will return if exact match is found

but i need the result if i search for whole string irrespective of case senstivity(ex: 38NHAVA OR 38nhava OR 38nHava)
# 5  
Old 04-23-2013
Put your input in one code tag. Like this, so people can figure out what you are trying to do:
Code:
blah blah
blah blah blah
blah

Also, show the expected output.
# 6  
Old 04-23-2013
That's what grep -i does.

Code:
$ cat input.txt
input.txt
-----------
38Nhava
anotherline
Line3

Code:
$ grep -i '38NHAVA' input.txt
38Nhava
$ grep -i '38nhava' input.txt
38Nhava

This User Gave Thanks to zoite For This Post:
jim mcnamara
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