我发现，要解决此问题，只能通过串口登录到机器，然后杀死锁程序，或者强行重新引导机器。

The only way I have found to recover from this is to either log into the machine via the serial port and kill off the lock program, or hard-reboot the machine.

youdao

操作：将电缆连接到网络设备并重新启动，或者禁用“基于链接的登录”并重新启动。

ACTION: Connect cable to the network device and restart, or disable Link Based Login and restart.

youdao

系统繁忙，请重新登录或者拨打95501咨询。

System busy, please logon again or call 95501.

youdao