text: var spawn = require('child_process').spawn;
  
  free = spawn('hexo', ['server', '-p 80']);/* 其实就是等于执行hexo server -p 4000*/
  
  free.stdout.on('data', function (data) {
  
      console.log('standard output:\n' + data);
  
  });
  
  free.stderr.on('data', function (data) {
  
      console.log('standard error output:\n' + data);
  
  });
  
  free.on('exit', function (code, signal) {
  
      console.log('child process eixt ,exit:' + code);
  
  });
  