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Help with shell script: selecting rows that have the same values in two columns

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# 1  
Old 03-31-2017
Help with shell script: selecting rows that have the same values in two columns
Hello, everyone

I am beginner for shell programming. I want to print all lines that have the same values in first two columns
data:

Code:
a  b   1   2
a  a   3   4 
b  b   5   6
a  b   4   6

what I expected is :
Code:
a  a   3   4 
b  b   5   6

but I searched for one hour in google, all scripts will give me this results:
Code:
a  b   4   6
a  b   1   2

Could anyone help me? This question stuck me a lot.
Last edited by vgersh99; 03-31-2017 at 04:35 PM.. Reason: code tags, please!
# 2  
Old 03-31-2017
Code:
awk '$1==$2' myFila

Last edited by RudiC; 03-31-2017 at 04:44 PM..
This User Gave Thanks to vgersh99 For This Post:
nengcheng
# 3  
Old 03-31-2017
Quote:
Originally Posted by vgersh99
awk '$1==$2' myFila
Great, Thank you so much.Smilie You know, It's very difficult for a beginner like to me to figure out even it's a very simple command.
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