1.新开一个screen ：
[root@localhost ~]# screen
2.进入screen执行脚本：
[root@localhost ~]# 省略...
3.脚本执行过程中可以关闭你的终端连接：
[root@localhost ~]# exit
4.查看脚本是否还在运行（或窗口状态）：
[root@localhost ~]# screen -ls
There is a screen on:
23790.pts-1.localhost (Attached) //这说明本地窗口连接没有关闭
1 Socket in /var/run/screen/S-xinfang.
[root@localhost ~]#
[root@localhost ~]# screen -ls
There is a screen on:
23790.pts-1.localhost (Detached) //这说明本地窗口连接已经关闭，但screen并未关闭
1 Socket in /var/run/screen/S-xinfang.
[root@localhost ~]#
5.查看主机cpu负载指数：
[root@localhost ~]# top
load average: 0.43
6.客户端切回screen窗口界面查看脚本执行状况：
[root@localhost ~]# screen -x 23790
7.推出screen：
[root@localhost ~]# exit
[screen isterminating] //标识该screen已经关闭
8.查看screen窗口是否关闭：
[root@localhost ~]# screen -ls
No Sockets found in/var/run/screen/S-xinfang. // 标识已经没有sockets 窗口连接，screen已经成功退出
[root@localhost ~]#
9.附带screen的相关命令：
[root@localhost ~]# screen -help
Use: screen [-opts] [cmd [args]]
or: screen -r [host.tty]
Options:
-a Force all capabilities into each window's termcap.
-A-[r|R] Adapt all windows to the new display width &height.
-cfile Read configuration file instead of '.screenrc'.
-d(-r) Detach the elsewhere running screen (and reattach here).
-dmSname Start as daemon: Screen session in detached mode.
-D(-r) Detach and logout remote (and reattach here).
-D-RR Do whatever is needed to get a screen session.
-exy Change command characters.
-f Flow control on, -fn = off, -fa = auto.
-hlines Set the size of the scrollback history buffer.
-i Interrupt output sooner when flow control is on.
-l Login mode on (update /var/run/utmp), -ln = off.
-list or -ls. Do nothing, just list our SockDir.
-L Turn on output logging.
-m ignore $STY variable, do create a new screen session.
-O Choose optimal output rather than exact vt100 emulation.
-pwindow Preselect the named window if it exists.
-q Quiet startup. Exits with non-zero return code ifunsuccessful.
-r Reattach to a detached screen process.
-R Reattach if possible, otherwise start a new session.
-sshell Shell to execute rather than $SHELL.
-S sockname Name this session.sockname instead of ...
-ttitle Set title. (window's name).
-Tterm Use term as $TERM for windows, rather than "screen".
-U Tell screen to use UTF-8 encoding.
-v Print "Screen version 4.00.03 (FAU) 23-Oct-06".
-wipe Do nothing, just clean up SockDir.
-x Attach to a not detached screen. (Multi display mode).
-X Execute as a screen command in the specified session.
[root@localhost ~]#