linux — screen 命令是 ssh 的有效補充

有時候會有這樣的問題，當在公司伺服器上開啟了一個終端，做了很多事情，或正開著某個服務程式,下班回家了。

突然有事需要接入到伺服器，如果用 ssh 連入，預設是一個新的終端，並不會開啟你之前在公司的那個會話。而這時又需要繼續在原來那個會話下操作。

今天發現 linux 下有一個 screen 命令，很有用.  在開啟終端後，先運行一下 screen ,這樣後續的操作都會被綁定到這個 screen 上。 而且可以在其它ssh 會話上使用 screen 命令開啟舊的會話 ,繼續未完成的事,甚至可以多個ssh連入同時共用一個會話，輸入的命令會在所有共用ssh用戶端同時顯示，非常有趣.

例：

 

A連上伺服器，並運行 screen 

ssh  user@server

screen 

 

B連上伺服器，開啟A的會話

ssh  user@server

screen -ls  # 查看會話id

screen -rx xxxxx  #開啟指定的會話.

 

 

 

更多請查看 screen 的協助:

 

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.

-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.

-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.

-p window     Preselect the named window if it exists.

-q            Quiet startup. Exits with non-zero return code if unsuccessful.

-r            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 4.00.03jw4 (FAU) 2-May-06".

-wipe         Do nothing, just clean up SockDir.

-x            Attach to a not detached screen. (Multi display mode).

-X            Execute <cmd> as a screen command in the specified session.