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Top Forums Shell Programming and Scripting Field matching between 2 files Post 302444703 by clx on Thursday 12th of August 2010 02:38:34 PM
Old 08-12-2010
In a simple way,

Code:
while IFS="," read f1 f2 IP f4
do
        F1=$(grep "$IP" ip1)
        F2=$(grep "$IP" ip2)
        F3=$(grep "$IP" ip3)
        if [ "$F1" ]; then
                echo "$f1,$f2,$IP,$f4,Srv1"
        elif [ "$F2" ]; then
                echo "$f1,$f2,$IP,$f4,Srv2"
        elif [ "$F3" ]; then
                echo "$f1,$f2,$IP,$f4,Srv3"
        else
                echo "$f1,$f2,$IP,$f4"
        fi
done < main_file


ip1, ip2, ip3 are the individual files.
Please note, while searching for the IP in individual files, there is no check whether the IP address is specifically in the last field. it is just searching the IP in the file.
 

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ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code: (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. EXIT CODE
2 - An option that is not supported was specified. AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)
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