use strict;  
use warnings;

my $opsys = $^O;
print "Hello, your operating system is: $opsys" . "\n";

if ($opsys =~ /linux/) {
    my $nics = qx |/sbin/ifconfig|
        or die("Can't get info from ifconfig: $!\n");

    my @nics = split /(?<=\n)(?=\w)/, $nics;

    for (@nics){
        my ($interface) = /^eth(\d)/
            or next;
        my ($ip) = /\binet addr:([\d.]+)/
            or next;
        print "Interface $interface has the IP Address of $ip\n";
    }
} else {
    my $nics = qx |ifconfig -a|
        or die("Can't get info from ifconfig: $!\n");

    my @nics = split /(?<=\n)(?=\w)/, $nics;

    for (@nics){
        my ($interface) = /^fjgi(\d)/
            or next;
        my (@ip) = /\binet ([\d.]+)\snetmask ([\d]+)\sbroadcast ([\d.]+)/
            or next;
        print "Interface $interface has the IP Address of $ip[0]\n \tNetmask: $ip[1]\n \tBroadcast $ip[2]\n";
    }
}


##</code><code>##

        my ($ip, $mask, $bcast) = /\binet ([\d.]+)\snetmask ([\d]+)\sbroadcast ([\d.]+)/
            or next;
        print "Interface $interface has the IP Address of $ip\n \tNetmask: $mask\n \tBroadcast $bcast\n";