NodeJS simple ssh checker, want to make this work better in the future. This is just a simple implementation of SSH2-module from the npm registry

nodejs-ssh2.js

var Connection = require('ssh2');

var c = new Connection();
c.on('connect', function() {
  console.log('Connection :: connect');
});
c.on('ready', function() {
  console.log('Connection :: ready');
  c.exec('uptime && echo && ps aux && echo && free', function(err, stream) {
    if (err) throw err;
    stream.on('data', function(data, extended) {
      console.log((extended === 'stderr' ? 'STDERR: ' : '') + data);
    });
    stream.on('end', function() {
      console.log('Stream :: EOF');
    });
    stream.on('close', function() {
      console.log('Stream :: close');
    });
    stream.on('exit', function(code, signal) {
      console.log('Stream :: exit :: code: ' + code + ', signal: ' + signal);
      c.end();
    });
  });
});
c.on('error', function(err) {
  console.log('Connection :: error :: ' + err);
});
c.on('end', function() {
  console.log('Connection :: end');
});
c.on('close', function(had_error) {
  console.log('Connection :: close');
});
c.connect({
  host: 'xxx.xxx.xxx.xxx',
  port: 22,
  username: 'root',
  privateKey: require('fs').readFileSync('id_rsa'),
  passphrase : 'password'
});