gethostbyname works for me. You didn't provide your code, so I can't tell if you are using it in the right way. I would do something like this: 
#!/usr/bin/perl

use strict;
use warnings;
use Socket;

my $packed_ip = gethostbyname('localhost.localdomain');

if (defined $packed_ip) {
   my $ip_address = inet_ntoa($packed_ip);
   print $ip_address, "\n";
}

[download]
Make sure that you check for definedness.

Using Sys::Hostname::FQDN, you can do an ascii-version of Anonymous Monk's post like this: 

#!/usr/bin/perl 

BEGIN {
    $|  = 1;
    $^W = 1;
}

use strict;
use warnings;
use Socket;
use Sys::Hostname::FQDN qw(
    asciihostinfo
    gethostinfo
    fqdn    
    short
);

my($name,$aliases,$addrtype,$length,@addrs) = asciihostinfo();

print qq|host info
  short name    : |, short(),   qq|
  long  name    ; |, fqdn(),    qq|
  aliases       : |, $aliases,  qq|
  address type  : |, $addrtype, qq|
  address length: |, $length,   qq|
  IP address(es):
|;

foreach(@addrs) {
    print "\t$_\n";
}

[download]

In reply to Re: gethostbyname returns reverse order of ipaddress expected by Khen1950fx
in thread gethostbyname returns reverse order of ipaddress expected by anubhavd

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