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Need Help in comparing 2 text files in shell script

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# 1  
Old 08-26-2013
Linux Need Help in comparing 2 text files in shell script
Hi All,

I have 2 files like below

vi f1
Code:
frog
elephant
rabit
zebra
dog

vi f2

Code:
rabit
dog

==============

Now i want to comapre two files and the result will be
Code:
frog
elephant
zebra


that means...the elements are not in f2 while compare with f1


Kindly do me helpfull

Thanks
Last edited by Scrutinizer; 08-26-2013 at 04:01 AM.. Reason: code tags
# 2  
Old 08-26-2013
You may use comm command. Look at

Code:
man comm

# 3  
Old 08-26-2013
Code:
nawk 'FNR==NR{a[$1]++;next}!a[$1]' f2 f1
use awk for linux

# 4  
Old 08-26-2013
Try:
Code:
grep -vf f2 f1

This User Gave Thanks to Scrutinizer For This Post:
kumar85shiv
# 5  
Old 08-26-2013
Thank you very much for replying me.

I have used
Code:
comm-3 f1 f2

...but i m not getting the required out put
Last edited by Scrutinizer; 08-26-2013 at 04:04 AM.. Reason: code tags
# 6  
Old 08-26-2013
comm only works on lexically sorted files.
# 7  
Old 08-26-2013
Quote:
Originally Posted by Scrutinizer
Try:
Code:
grep -vf f2 f1

my grep does not support "f" option unfortunately so i went for awk.

Code:
bash-3.00$ grep -vf f2 f1
grep: illegal option -- f
Usage: grep -hblcnsviw pattern file . . .
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