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Which command can help me output lines with duplicate numbers?

 
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Top Forums UNIX for Dummies Questions & Answers Which command can help me output lines with duplicate numbers?
# 1  
Old 08-11-2010
Which command can help me output lines with duplicate numbers?
i have a file, let's call it file.

march 2008 january 2008
march 1920 march 2002

i want to output the first line, not the second as you can see the second line has different numbers.
# 2  
Old 08-11-2010
Try...
Code:
awk '$2==$4' file

This User Gave Thanks to Ygor For This Post:
hobiwhenuknowme
# 3  
Old 08-11-2010
my file contains:
march 2008 january 2008
march 1920 march 2002

awk ' $2==$4 ' filename
no output.
# 4  
Old 08-11-2010
Code:
awk ' $2==$4 ' filename

It should provide what you require. if the fields are seperated by tab you must use

Code:
awk '$2==$4' FS=\t filename

-Raja
This User Gave Thanks to rajamadhavan For This Post:
hobiwhenuknowme
# 5  
Old 08-11-2010
Hmm, works here. What OS are you using?

Does
Code:
awk '$2 == $4 { print; }' filename

work? If you have nawk or gawk, try this.
This User Gave Thanks to hergp For This Post:
hobiwhenuknowme
# 6  
Old 08-11-2010
i got putty installed on windows xp.

awk '$2==$4' FS=\t filename
this is the only one which gave an output but displays both lines.

i tried awk '$2==$4' filename
awk ' $2==$4 ' filename
awk '$2 == $4' filename
awk '$2 == $4 { print; }' filename
something wrong in my system i guess.
# 7  
Old 08-11-2010
To find the OS, run uname -a on your putty terminal..

Code:
awk '{if($2==$4) print}' FS=" " filename

This User Gave Thanks to rajamadhavan For This Post:
hobiwhenuknowme
 
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