最近升级了一下，完了后发现打不开后台管理页面了，页面显示如下图，该如何操作？关键我ssh的密码也认不到了，ssh也无法连接。
发不了图，页面上就几个英文，我复制如下：
Welcome to nginx!
If you see this page, the nginx web server is successfully installed and working. Further configuration is required.
For online documentation and support please refer to nginx.org.
Commercial support is available at nginx.com.
Thank you for using nginx.
已解决，用root账户可以登录ssh
