I've downloaded and installed this module but am having trouble using it when passing the hostname to be pinged or I.P. from an array. The script does not write anything to the screen. I don't get any errors and no output.... 
use strict;
use Net::Ping::External qw(ping);

my ($server);

open (SERVERS, "<serverlist.txt");

my @srvlist = <SERVERS>;
foreach $server (@srvlist)
{
    # chop;
    my $alive = ping(host => "\${server}");
      print "$server is online" if $alive;
}
close(SERVERS);

[download]

In reply to Net::Ping:External by wahoowa

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.