如何在ubuntu上完成所有命令并发处理并继续其余命令 [英] how to process several commands concurrently and continue the rest only after all is done on ubuntu
问题描述
具体来说，我需要在Ubuntu 上的shell中同时运行两个命令，例如 command_A 和 command_B 。我还有一些其他命令仅在 command_A 和 command_B 完成后才需要运行，这些命令称为 command_rest 。此外， command_A 和 command_B 在单独的终端中运行，完成后便可以自行关闭。我猜这可能需要与信号和 wait 和 gnome-terminal 相关的技术，但我找不到解决方案。
To be specific, I have two command need to be run in shell on Ubuntu at the same time, like command_A and command_B. And I have some other commands need to be run only after command_A and command_B has finished, named as command_rest. In addition, command_A and command_B run in separate terminals and when they are finished they can close themselves. This maybe need techniques related to signal and wait and gnome-terminal i guess, but i cannot find a solution.
推荐答案
您可以使用fifo进行以下操作：
You can do it like this using a fifo to synchronise:
# Once in either Terminal
mkfifo A B
# In first Terminal
( echo CommandA; sleep 3; echo done > A ) &
# In second Terminal
( echo CommandB; sleep 8; echo done > B ) &
# In third Terminal
read < A; read < B; echo Rest
基本上，在 Rest 运行之前，它必须同时从 A 和 B 中读取内容，直到 CommandA 已完成并写入 A ，并且 CommandB 已完成并写入到 B 。
Basically, before Rest can run, it has to have read something from both A and B and nothing will arrive for it to read until CommandA has finished and written to A and also CommandB has finished and written to B.
上面只是一个回显 CommandA 和 CommandB 和 Rest 而不是运行我没有的命令。您实际上会想要这样的东西（我已经对其进行了修改，因此您可以在各个终端中的不同目录中）
The above is just an example that echoes CommandA and CommandB and Rest instead of running commands that I don't have. You will actually want something like this (I have modified it so you can be in different directories in the various Terminals)
# Once in either Terminal
mkfifo /tmp/A /tmp/B
# In first Terminal
( CommandA; echo done > /tmp/A ) &
# In second Terminal
( CommandB; echo done > /tmp/B ) &
# In third Terminal
read < /tmp/A; read < /tmp/B; commandRest
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