my $exp = Expect->spawn("sftp","username@host") or fatalmsg("$sender Cannot spawn sftp command");

  $exp->expect($timeout,
          ["Password Authentication"],
          ["Are you sure you want to continue connecting", sub {my $self = shift; $self->send("yes\n");}]
          );
  $exp->expect($timeout, ["password:"]);
  $exp->send('xxxxx');
  $exp->expect($timeout, ["sftp>"]);
  my $cmd = "rename path/Long_Filename new_path/Long_Filename";
  $exp->send("$cmd\n");
  $exp->expect($timeout, ["sftp>"]);

##</code><code>##

sub print (@) {
  my ($self, @args) = @_;
  return if not defined $self->fileno(); # skip if closed
  if (${*$self}{exp_Exp_Internal}) {
    my $args = _make_readable(join('', @args));
    cluck "Sending '$args' to ${*$self}{exp_Pty_Handle}\r\n";
  }
  foreach my $arg (@args) {
    while (length($arg) > 80) {
      $self->SUPER::print(substr($arg, 0, 80));
      $arg = substr($arg, 80);
    }
    $self->SUPER::print($arg);
  }
}