网络中断后自动(或更容易)重新连接到屏幕会话 [英] Automatically (or more easily) reconnect to a screen session after network interruption

问题描述

添加:我认为，这个问题现在包含在这个问题中: 完全透明，自动地使用GNU屏幕

ADDED: This question is now, I believe, subsumed by this one: Using GNU Screen completely transparently and automatically

另请参阅以下相关问题:
https://superuser.com/questions/147873/ssh-sessions-in-xterms在每次断开连接时冻结很多分钟

See also this related question:
https://superuser.com/questions/147873/ssh-sessions-in-xterms-freeze-for-many-minutes-whenever-they-disconnect

原始问题:

如果有一种方法可以SSH到计算机并立即重新连接到特定的屏幕会话，那就太好了.您可以这样做:

It would be nice if there were a way to ssh to a machine and immediately reconnect to a specific screen session. You can do this:

laptop> ssh server.com screen -ls

，它将显示server.com上可用的屏幕列表，如下所示:[1]:

and it will show a list of screens available on server.com like so [1]:

123.pts-1
456.pts-2

然后您可以尝试执行以下操作:

And then you might try to do this:

laptop> ssh server.com screen -dr pts-2

但是失败，说必须连接到终端". 您必须先使用ssh，然后在server.com上执行"screen -dr pts-2"，如果连接不稳定并断开很多连接，则这样做是不好的.您希望能够通过笔记本电脑上的简单向上箭头输入"来恢复. (或者可能使其更加自动化.)

but that fails, saying "Must be connected to a terminal." You have to ssh in first and then do the "screen -dr pts-2" on server.com which is no good if you have a flaky connection and get disconnected a lot. You want to be able to resume with a simple "up-arrow enter" on the laptop. (Or perhaps make it even more automatic.)

对于这个问题，我有一个灵巧的解决方案，我将作为答复发布该解决方案，并希望它能被淘汰，以支持正确的方式解决此问题.

I have a rihackulous solution to this problem which I'll post as an answer and hope it gets downvoted to oblivion in favor of the Right Way to deal with this.

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脚注:

[1]或者，更好的是，如果您使用"screen -S foo"和"screen -S bar"之类的名称创建了屏幕会话，那么您将获得一个更友好的列表，例如:

[1] Or, better, if you created the screen sessions with names like "screen -S foo" and "screen -S bar" then you'll get a friendlier list like:

123.foo
456.bar

，并且可以与"screen -dr foo"重新连接.

and can reconnect with, eg, "screen -dr foo".

登录server.com并执行

Login in to server.com and do

screen -S foo 

，然后再也不会退出该会话. 要从其他地方重新连接到它，请执行

and then never log out of that session again. To reconnect to it from elsewhere, do

ssh -t server.com screen -dr foo

列出要重新连接到的可用屏幕

To list available screens to reconect to:

screen -ls

，当然，

ssh server.com screen -ls

以远程查看server.com的可用屏幕.

to check on server.com's available screens remotely.

我现在根据以下杰森的回答，使用以下别名(tcsh)连接到命名屏幕(如果存在)，否则创建并连接:

I now use the following alias (tcsh), based on Jason's answer below, to connect to a named screen if it exists or create and connect otherwise:

alias ssc 'ssh -t \!:1 "screen -S \!:2 -dr || screen -S \!:2"'

推荐答案

-t选项是否可以满足您的要求?

Does the -t option do what you want?

     -t      Force pseudo-tty allocation.  This can be used to execute arbi-
             trary screen-based programs on a remote machine, which can be
             very useful, e.g. when implementing menu services.  Multiple -t
             options force tty allocation, even if ssh has no local tty.

所以:

laptop> ssh -t server.com screen -dr pts-2

这似乎在我的安装中有效.

This seems to work in my installation.

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