https://blog.wongcw.com/2018/10/26/xshell-6-plus-v6-0-0009-xshell-6-v6-0-0101-%e5%a4%9a%e8%af%ad%e8%a8%80%e4%b8%ad%e6%96%87%e6%ad%a3%e5%bc%8f%e7%89%88/