const {spawn} = require('child_process');
const readline = require('readline');



const ls = spawn('ls', ['-lh', '/usr']);

const rl = readline.createInterface({
  input: ls.stdout
});

rl.on('line', (line) => {
  console.log(line);
});

ls.on('close', (code) => {
  console.log(`code: ${code}`);
});