Filter ifconfig with Perl

chenhow — Tue, 07 Oct 2008 00:55:09 +0000

Linux/Unix: Below is the commands to filter ifconfig to show only the eth0 IP address in Linux.

Perl Script:

Option 1

eth0 | grep “inet addr”| awk {‘print $2′} | perl -e ‘while(<>){ ($a,$b)=split/:/; print $b; }’

Option 2

ifconfig eth0 | grep “inet addr” | perl -e ‘while (<>) { ($inet, $addr, $ip, $others) = /(\w+)\s+(\w+):(\S+)\s+(.*)/; print $3.”\n”;}’

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