命令执行无回显

https://boluochuixue.top/2019/07/08/rce%E6%97%A0%E5%9B%9E%E6%98%BE%E7%9A%84%E4%B8%80%E7%A7%8D%E5%8A%9E%E6%B3%95/

1 dnslog

2反弹shell

3 sleep执行

4 找目录写文件

https://developer.jdcloud.com/article/991