Linux 多窗口管理 screen

使用背景

用ssh连接到Linux服务器，启动tornado，当前session则一直被占据，笨办法是再开一个terminal，不过这样很乱。终端机器关机后很难再管理之前的会话。遂，借助工具 screen，Screen是一个全屏的窗口管理工具，使一个实体终端管控多个进程，典型应用是交互式shells。
官网 http://www.gnu.org/software/screen/

Ubuntu安装

sudo apte-get install screen

基础使用

新建一屏

screen -S screenName001

此时会新开一个bash窗口

查看当前状态

Ctrl+a + w

显示出这个样子 0*$ bash ，多个screen时，* 标记为当前屏幕。

暂时退出当前屏

ctrl+a +d
令该屏为detached状态，进程仍在后台运行。此时退回普通窗口。

在普通窗口查看screen状态

screen -ls
会列出在运行的各个screen

进入其中一个

screen -r screenName001
也可以用进程号进入，或者『进程号.screenName001』

杀死当前screen

ctrl+a：quit
退出当前屏，一并杀死该屏中所有进程。

screen options一览

Options:
-4            Resolve hostnames only to IPv4 addresses.
-6            Resolve hostnames only to IPv6 addresses.
-a            Force all capabilities into each window's termcap.
-A -[r|R]     Adapt all windows to the new display width & height.
-c file       Read configuration file instead of '.screenrc'.
-d (-r)       Detach the elsewhere running screen (and reattach here).
-dmS name     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.
-e xy         Change command characters.
-f            Flow control on, -fn = off, -fa = auto.
-h lines      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.
-ls [match]   or -list. Do nothing, just list our SockDir [on possible matches].
-L            Turn on output logging.
-m            ignore $STY variable, do create a new screen session.
-O            Choose optimal output rather than exact vt100 emulation.
-p window     Preselect the named window if it exists.
-q            Quiet startup. Exits with non-zero return code if unsuccessful.
-r [session]  Reattach to a detached screen process.
-R            Reattach if possible, otherwise start a new session.
-s shell      Shell to execute rather than $SHELL.
-S sockname   Name this session <pid>.sockname instead of <pid>.<tty>.<host>.
-t title      Set title. (window's name).
-T term       Use term as $TERM for windows, rather than "screen".
-U            Tell screen to use UTF-8 encoding.
-v            Print "Screen version 4.01.00devel (GNU) 2-May-06".
-wipe [match] Do nothing, just clean up SockDir [on possible matches].
-x            Attach to a not detached screen. (Multi display mode).
-X            Execute <cmd> as a screen command in the specified session.

参考
http://www.gnu.org/software/screen/
http://www.cnblogs.com/mchina/archive/2013/01/30/2880680.html