如何在Bash中暂停和恢复一系列命令? [英] How do I suspend and resume a sequence of commands in Bash?

问题描述

我有cmd2，在cmd1完成后需要遵循.有时我需要暂停cmd1.

I have cmd2 that needs to follow after cmd1 completes. I need to pause cmd1 sometimes.

我输入

$ cmd1 && cmd2

，然后按Ctrl+Z (Stop)键停止cmd1.现在，cmd1已暂停，但是当我恢复时，它在cmd1完成后不会启动cmd2.

and then press Ctrl+Z (Stop) to stop cmd1. Now, cmd1 is paused but when I resume, it does not start cmd2 after completion of cmd1.

我输入

$ cmd1 ; cmd2

，然后按Ctrl+Z (Stop)停止cmd1.现在cmd1已暂停，但立即开始cmd2.但是，我希望仅在cmd1完成后才开始cmd2.

and then I press Ctrl+Z (Stop) to stop cmd1. Now cmd1 is paused but it immediately starts cmd2. However, I wish to start cmd2 only after cmd1 finishes.

我做了一些研究，有人在zsh中提出了一种优雅的方法，但是我想知道在bash中是否有一种优雅的方法.

I did some research and someone suggested an elegant way in zsh but I wonder if there is an elegant way of doing it in bash.

推荐答案

在子shell中运行它:

Run it in a subshell:

(cmd1 && cmd2)

示例:

$ (sleep 5 && echo 1)                        # started the command chain
^Z
[1]+  Stopped         ( sleep 5 && echo 1 )  # stopped before `sleep 5` finished
$ fg                                         # resumed
( sleep 5 && echo 1 )
1                                            # `sleep 5` finished and `echo 1` ran

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