如果想杀死一个已经detached的screen会话，可以使用以下命令：
screen -X -S [session # you want to kill] quit
root@leco:~# screen -ls There are screens on: 17708.pts-4.leco(06/15/2017 02:39:09 PM)(Attached) 14814.pts-2.leco(06/15/2017 02:22:52 PM)(Detached) 14795.pts-2.leco(06/15/2017 02:22:44 PM)(Detached) 14442.pts-2.leco(06/15/2017 02:22:31 PM)(Detached) 4 Sockets in /var/run/screen/S-root.
root@leco:~# screen -X -S 17708 quit root@leco:~# screen -ls There are screens on: 14814.pts-2.leco(06/15/2017 02:22:52 PM)(Detached) 14795.pts-2.leco(06/15/2017 02:22:44 PM)(Detached) 14442.pts-2.leco(06/15/2017 02:22:31 PM)(Detached) 3 Sockets in /var/run/screen/S-root.
原文：http://caimengzhi.blog.51cto.com/9787265/1937116