call commands over ssh like object methods
$ssh = new $Ssh();
$ssh->connect('localhost');
$ssh->auth('login', 'password');
var_dump($ssh->ls('-la'));
var_dump($ssh->whoami());
// ... connection made...
var_dump( $ssh->shell('sudo -i')); // trying to get root access
var_dump($ssh->shell('password')); // input our password here
var_dump($ssh->shell('reboot')); // call reboot command :D