Linux 终端：如何捕获或观看其他终端会话
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Linux Terminal: how to capture or watch other terminal session
提问by user149513
Let say, I access to a server using ssh. In the same time, there is another person accessing that server.
比方说，我使用 ssh 访问服务器。同时，还有另一个人访问该服务器。
Is it possible to watch what is going on in that person's terminal. Meaning, Can I just watch what he is typing?
是否可以观看该人的终端中发生的事情。意思是，我可以看看他在打什么吗？
采纳答案by Martin v. L?wis
回答by Ryan C. Thompson
If you mean that the other person wantsyou to see his console, you two can use screen to share a terminal. See http://www.gnu.org/software/screen/manual/html_node/Multiuser-Session.htmlfor a full description of how to do it.
如果你的意思是对方想让你看到他的控制台，你们两个可以使用 screen 来共享一个终端。有关如何执行此操作的完整说明，请参阅http://www.gnu.org/software/screen/manual/html_node/Multiuser-Session.html。
回答by Patrick
You can also try "cat /dev/vcsa1"
你也可以试试 "cat /dev/vcsa1"
回答by Coder of Salvation
Well depending on whether its for 'live' or 'ondemand' purposes, you could replay it online with a service like www.playterm.org.
好吧，取决于它是用于“实时”还是“按需”目的，您可以使用www.playterm.org 之类的服务在线重播。
回答by Maze
回答by estani
I also use an approach similar to what Maze said. This is a unidirectional sharing with read-only for the guest. This is how it works:
我也使用了类似于迷宫所说的方法。这是访客只读的单向共享。这是它的工作原理：
1) The host starts the scriptcommand writing somewhere where the guest has read access and set the permits as required, for example:
1）主机script在guest有读访问权限的地方开始写入命令并根据需要设置许可，例如：
$ script -f /tmp/shared_screen
Script was started....
$ chmod 640 /tmp/shared_screen
$ chgrp shared_group /tmp/shared_screen
The -fflushes the contents permanently so you'll have a very low delay
该-f永久刷新内容，这样你就会有一个非常低的延迟
2) The guest starts dumping the content of the file:
2) 来宾开始转储文件内容：
$ tail -f /tmp/shared_screen
In this case -fcauses tail to wait on more output from the file. Use ctrl-Cto stop displaying the file contents.
在这种情况下，-ftail 会等待来自文件的更多输出。使用ctrl-C停止显示该文件的内容。
回答by Benji York
If you want to share a session on a machine behind a firewall or NAT, you can use the open-source terminal sharing program Termbeamer.
如果要在防火墙或 NAT 后面的机器上共享会话，可以使用开源终端共享程序Termbeamer。
回答by David Cary
To capturewhat Alice types in a terminal, and then the next day let Bob see what was typed -- without any risk of Bob accidentally typing anything into that terminal -- Alice can type "showterm" ( http://showterm.io) in her terminal window to start the recording.
要捕获Alice 在终端中键入的内容，然后第二天让 Bob 查看键入的内容——没有 Bob 不小心在终端中键入任何内容的风险——Alice 可以键入“showterm”（http://showterm.io）在她的终端窗口中开始录制。
To sharea terminal so Alice and Bob both see "the same" terminal window and can both type commands into that window, there seems to be three popular methods: Byobu, tmux, or screen.
要共享一个终端，以便 Alice 和 Bob 都能看到“相同”的终端窗口并且都可以在该窗口中键入命令，似乎有三种流行的方法： Byobu、tmux或screen。
(tmateis a fork of tmux that works just as well, perhaps better).
（tmate是 tmux 的一个分支，它也能正常工作，也许更好）。
- "How to Share a Terminal Session with Friends" (with Byobu)
- "Sharing Terminal Sessions With Tmux And Screen"
- "ask Ubuntu: Share SSH Session at login"
- "Remotely Working Together on a Terminal Session in Linux" (with screen)
- Ubuntu: "HOWTO: Connect to another user's console terminal using 'screen'"
- "HowTo Share A Terminal Session Using Screen"
回答by Roberk20
Something nice and easy:
一些美好而简单的事情：
watch -n 1 cat /dev/vcsa1
watch -n 1refers for the time to refresh.
watch -n 1指刷新的时间。
