1、查看会话

 # screen -ls
 There is a screen on:
     185512.checkice    (Detached)
 1 Socket in /var/run/screen/S-root.

2、清除会话

方法一：

 # screen  -X -S 185512 quit

 验证结果：
 # screen -ls
 No Sockets found in /var/run/screen/S-root.


 语法： screen  -X -S ID quit

方法二：

  screen -r ID/NAME
  并利用exit退出并kiil掉session。

  例如：

      # screen  -ls
      There is a screen on:
          5694.test    (Detached)
      1 Socket in /var/run/screen/S-root.

      # screen  -r 5694
      [screen is terminating]
      =====>进入screen会话输入：exit 或 按快捷键 ctrl + D 退出

      # screen  -ls     
      No Sockets found in /var/run/screen/S-root.