安装screen：yum install -y screen
创建screen：screen -S lnmp
恢复screen：screen -r lnmp
退出screen：
方法一：
screen -ls //查看所有screen会话
There is a screen on:
25624.pyapi (Detached)
1 Socket in /var/run/screen/S-root.
screen -r 25624 //进入要中断的screen
exit //exit 或者 control +c 退出 screen
退出 ctrl +a +d
终止 ctrl +a + k
方法二：
screen -ls
There is a screen on:
52233.pyapi (Detached)
1 Socket in /var/run/screen/S-root.
screen -S 52233.pyapi -X quit