#!/usr/bin/perl
use strict;
use warnings;
use Net::Ping;

my @host_array = ("127.0.0.1", "10.0.0.10");
my $p = Net::Ping->new("tcp");
# $p->bind($my_addr); # Specify source interface of pings
foreach my $host (@host_array) {
    print "$host is ";
    print "NOT " unless $p->ping($host, 2);
    print "reachable.\n";
    sleep(1);
}
$p->close();

__END__

$ perl test.pl
127.0.0.1 is reachable.
10.0.0.10 is NOT reachable.

##</code><code>##

#!/usr/bin/perl
use strict;
use warnings;
use Net::Ping;

my @host_array = ('localhost', '10.0.0.10');
# High precision syntax (requires Time::HiRes)
my $p = Net::Ping->new();
$p->hires();
foreach my $host (@host_array) {
    my ($ret, $duration, $ip) = $p->ping($host, 2);
    if ($ret) {
	printf("$host [ip: $ip] is alive (packet return time: %.2f ms)\n",
	       1000 * $duration);
    }
    else {
	printf("$host [ip: $ip] is not alive (packet return time: %.2f ms)\n",
	       1000 * $duration);
    }
    sleep(1);
}
$p->close();

__END__

$ perl test.pl
localhost [ip: 127.0.0.1] is alive (packet return time: 0.11 ms)
10.0.0.10 [ip: 10.0.0.10] is not alive (packet return time: 2002.36 ms)