linux新开screen后台跑脚本

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 ~]#