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Compare two files and output diff to third file

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# 8  
Old 09-25-2008
Thank you era. That keen eye from herding cats has found the option for me.

The ip strings can be variable length within the octets as 111.111.111.111 or 111.11.1.11 and the -x option allowed me to find an exact match on the whole line.

I was using

Code:
/usr/xpg4/bin/grep -v -f $file2 $file1 > $file3

on a Solaris 10 box, which is thought by me to be the same as fgrep, but my reference did not show the -x option under either grep of fgrep, but I looked closer and it told me the options for fgrep, egrep and some versions of grep were the same. I looked in the egrep def and sure enough, my reference paraphrases era.

This
Code:
/usr/xpg4/bin/grep -vxF -f $file2 $file1 > $file3

and this one
Code:
fgrep -xv -f "$file2" $file1 > $file3

worked correctly.

Thanks again to the group for your help.

JB
# 9  
Old 09-25-2008
wOoT!
I was just browsing through.. nice solution!! Smilie Smilie
Quote:
Originally Posted by Franklin52
Replace:

Code:
while read HOST
do
   grep -v "$HOST" $file1 > $file3
done < $file2

with:

Code:
grep -v -f $file2 $file1 > $file3

Regards
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