use strict;
use warnings;

use Net::SSH::Perl;
use Net::SSH::Perl::Constants qw( :msg );

my $host1='machineB';
my $usr1='usrB';
my $pass1='passwdB';

my $host2 = 'machineC';
my $usr2 =  'usrC';
my $cmd = "/opt/exp/bin/ssh -t -l $usr2 $host2 uname -a";

my $debug=0;

my $ssh1 = Net::SSH::Perl->new($host1, use_pty=>1, protocol=>1,
	interactive=>1, debug=>$debug) ||
	die "Cannot conntact target machine, exiting...";

$ssh1->login($usr1, $pass1) ||
	die "Bad login, exiting...";

print STDERR "\n\nUsing SSH1 Protocol\n";
my ($out, $err, $exit) = $ssh1->cmd($cmd);

print STDERR "exit=$exit\n";
print STDERR "OUT: $out\n" if $out;
print STDERR "ERR: $err\n" if $err;

# Using SSH2...

# Adding use_pty=>1 does not work when using SSH2. See:
# http://www.derkeiler.com/Newsgroups/comp.security.ssh/2003-05/0097.html
my $ssh2 = Net::SSH::Perl->new($host1, protocol=>2, use_pty=>1,
	interactive=>1, debug=>$debug) ||
	die "Cannot conntact target machine, exiting...";

$ssh2->login($usr1, $pass1, 0) ||
	die "Bad login, exiting...";

print STDERR "\n\nUsing SSH2 Protocol\n";
($out, $err, $exit) = $ssh2->cmd($cmd);

print STDERR "exit=$exit\n";
print STDERR "OUT: $out\n" if $out;
print STDERR "ERR: $err\n" if $err;