Question

目前，我正在iPad上使用GNU屏幕，并在连接丢失的情况下利用屏幕作为安全措施。目前，我只是将屏幕-S ipad作为第一个命令运行，但有没有办法让它自动连接到旧的ipad会话（如果存在的话）（如果不存在则创建它）？我的一个警告是，我想在一个命令中自动执行此操作。

Answer 1

-D -R选项会使屏幕在必要时尝试分离或创建。

screen -D -R -S ipad

我建议您查看屏幕手册中的所有-d|D -r|-R|-RR选项，因为有很多类似的结果。

-d -r
    Reattach a session and if necessary detach it first. 
-d -R
    Reattach a session and if necessary detach or even create it first. 
-d -RR
    Reattach a session and if necessary detach or create it. Use the first session if more than
    one session is available. 
-D -r
    Reattach a session. If necessary detach and logout remotely first. 
-D -R
    Attach here and now. In detail this means: If a session is running, then reattach. If necessary
    detach and logout remotely first. If it was not running create it and notify the user. This is
    the author's favorite. 
-D -RR
    Attach here and now. Whatever that means, just do it. 
    Note: It is always a good idea to check the status of your sessions by means of "screen -list".

如果存在GNU Screen连接，如果不存在则创建

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