运行shell脚本并立即将其后台运行，但是保持检查其输出的能力 [英] run a shell script and immediately background it, however keep the ability to inspect its output

问题描述

如何运行shell脚本并立即使其后台运行，但是可以随时通过拖尾/tmp/output.txt来检查其输出的能力

How can I run a shell script and immediately background it, however keep the ability to inspect its output any time by tailing /tmp/output.txt

如果我可以过早地介绍该过程，那就太好了.

It would be nice if I can foreground the process too later.

PS，如果您还可以向我展示如何将后台进程发送"到可能尚未初始化的gnu屏幕中，那将非常酷.

PS It would be really cool if you can also show me how to "send" the backgrounded process in to a gnu screen that may or may not have been initialized.

推荐答案

在启动进程时使其后台"

在命令后只需添加一个&符即可.

To 'background' a process when you start it

Simply add an ampersand (&) after the command.

如果程序写入标准输出，它仍将写入控制台/终端.

If the program writes to standard out, it will still write to your console/terminal.

只需使用fg命令即可使该过程成为前台.

To foreground the process, simply use the fg command.

(您可以使用jobs在后台看到作业列表.)

(You can see a list of jobs in the background with jobs.)

例如:

如果您已经在前台启动了该过程，但是想要将其移至后台，则可以执行以下操作:

If you have already started the process in the foreground, but you want to move it to the background, you can do the following:

1. 按Ctrl + z可使当前进程进入睡眠状态并返回到您的shell. (此过程将暂停，直到您发送另一个信号为止.)
2. 运行bg命令以恢复该过程，但使它在后台而不是在前台运行.

1. Press Ctrl+z to put the current process to sleep and return to your shell. (This process will be paused until you send it another signal.)
2. Run the bg command to resume the process, but have it run in the background instead of the foreground.

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