unix tty 监控程序,是用底层驱动实现的，可以监控所有登陆到本机上的用户-monitoring program is the use of the underlying drive to achieve, and can monitor all of the aircraft landing on the users

unix tty 监控程序,是用底层驱动实现的，可以监控所有登陆到本机上的用户-monitoring program is the use of the underlying drive to achieve, and can monitor all of the aircraft landing on the users