const { Client } = require('ssh2');
const conn = new Client();
conn.on('ready', () => {
 console.log('Client :: ready');
 conn.sftp((err, sftp) => {
 if (err) throw err;
 sftp.readdir('foo', (err, list) => {
 if (err) throw err;
 console.dir(list);
 conn.end();
 });
 }, { command: '/usr/bin/sudo /usr/libexec/sftp-server' } );
}).connect({
 host: '192.168.100.100',
 port: 22,
 username: 'frylock',
 password: 'nodejsrules'
});