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how to finding the exact pattern

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# 1  
Old 12-22-2010
how to finding the exact pattern
I have a output like below:

Code:
A1
B2
C1
D3
A12
B4
A14

I am trying to find A1 by using grep

Code:
grep -i "A1"

But I got

Code:
A1
A12
A14

So, How can I found only A1? Please suggest.
# 2  
Old 12-22-2010
could try as..
Code:
grep -i 'A1$' inputfile
or
grep -iw 'A1' inputfile

This User Gave Thanks to michaelrozar17 For This Post:
anupdas
# 3  
Old 03-17-2011
TRY BOTH
Code:
awk '/A1$/' File_Name

(OR)
Code:
grep "A1$" File_Name

# 4  
Old 03-17-2011
using 'A1$' is ok for the example in the top post. but it is NOT secure.
e.g.
Code:
A1
aA1
bA1

if apply the pattern on the file above, all lines will be printed out.

I think the right solution would be
Code:
grep -Fx "A1",

.
example:
Code:
kent$ echo "A1
A12
aA1
 A1
A1 " | grep -xF "A1"
A1

# 5  
Old 03-17-2011
if A1 is alone on the line you can use
Code:
grep "^A1$"

if A1 may be mixed with other data
Code:
grep -w "A1"

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