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                         GNU Screen的一个功能是锁定屏幕. 
  
  手册页说:  
  
  
  lockscreen  
  Lock this display. Call a screenlock  program (/local/bin/lck or  /usr/bin/lock or a builtin if no other  is available). Screen does not accept  any command keys until this program  terminates. Meanwhile processes in the  windows may continue,as the windows  are in the `detached’ state. The  screenlock program may be changed  through the environment variable  $LOCKPRG (which must be set in the  shell from which screen is started)  and is executed with the user’s uid  and gid. Warning: When you leave other  shells unlocked and you have no  password set on screen,the lock is  void: One could easily re-attach from  an unlocked shell. This feature should  rather be called ‘lockterminal’.  
   
 如果我登录Linux控制台启动屏幕,然后锁定会话然后离开,那么一个人可以退出屏幕并使用我的凭据下的系统.手册页上面的部分对我来说并不完全清楚.假设攻击者没有其他系统访问权限,他们将不会重启系统. 
解决方法
 不,你很安全. 
  
 如果我不得不猜测你对这个人工页面感到困惑的话,我会说这是警告部分.他们试图说的是,屏幕会话本身并不是锁定的,而是该特定终端上的实例.如果你留下攻击者可以以用户身份启动屏幕的shell,他们就可以访问你在锁定屏幕中运行的内容.  
 我不确定为什么这是一个场景.如果它是服务器,为什么不用SSH登录?如果它是台式机 – 为什么不运行xlock呢? 
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