/* npm install simple-ssh */

var SSH = require('simple-ssh');
var ssh = new SSH({
host: '2.2.2.2',
user: 'root',
pass : 'root'
});

ssh.exec('cd /var/www/site.com/public_html/ && git pull', {
pty: true,
out: function(stdout) {
  console.log(stdout);
}
}).start();