linux-screen终端会话后台运行

screen

linux终端关闭，也不影响终端里命令的正常运行，就需要screen及tmux

特点

• 会话恢复
• 多窗口
• 会话共享

install && used

yum install -y screen

//状态说明
Attached 在线，在终端中
Detached 离线,关闭终端
dead     会话死掉

//创建会话，且指定名字
screen -S gaga

//查看会话
[root@c7-101 ~]# screen -ls
There are screens on:
	1515.gaga	(Attached 在线)  -> Detached(离线)
	993.pts-1.c7-101	(Attached)
2 Sockets in /var/run/screen/S-root.

//恢复登录到会话(pid/name都可以登录)
screen -r 1515
screen -r gaga

//会话离线
screen -d gaga
screen -d -r yy   //离线当前会话，登录到yy会话

//会话共享(多个用户可以看到使用一个会话的terminal)
screen -S all  //打开终端a
screen -x   //另外打开终端b,同步会话
screen -x -r all  //如果存在多个会话指定那个实时同步

//清理dead会话
screen -wipe

//退出会话
screen -r xxx
exit
screen -ls

screen help

screen
    -S 指定会话名称
    -d 会话离线
    -r 恢复会话
    -x 恢复所有离线会话
    -ls/-list  查看所有会话
    -wipe 检查自动讲无法使用会话删除

[root@c7-101 ~]# screen -h
Use: screen [-opts] [cmd [args]]
 or: screen -r [host.tty]

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.  //自适应尺寸
-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.
-Q            Commands will send the response to the stdout of the querying process.
-r [session]  Reattach to a detached screen process.  //连接到session
-R            Reattach if possible, otherwise start a new session.
-s shell      Shell to execute rather than $SHELL. //连接执行命令
-S sockname   Name this session <pid>.sockname instead of <pid>.<tty>.<host>.  //指定会话名字
-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.