如果你的工作流程中充斥着大量重复的动作，那么寻找改进和简化工作流程的方法是没有坏处的。今天的超级用户问答文章为读者提供了一些有用的建议，以帮助他们改进自己的工作流程。

今天的问答环节是由SuperUser提供的，SuperUser是Stack Exchange的一个分支，是一个由社区驱动的问答网站分组。

由马特·乔伊斯（Flickr）提供的屏幕截图。

问题

超级用户读者coin想知道如何快速更改bash命令中的第一个单词：

I would like to improve my workflow in bash and realized that I often want to execute the same command to a different executable.

Some Examples

1.) Git

2.) Bash

I know that I can hit Ctrl+a then Del to remove the first word, but I am wondering if there is a quicker way to do it.

coin有没有更快的方法来更改bash命令中的第一个单词？

答案

超级用户贡献者Spiff，Hastur，jjlin。Gustavo Giraldez给了我们答案。首先，斯皮夫：

!$ expands to the last word of your previous command. So you could do:

Or

Your examples happened to only repeat the last word, so !$ worked fine. If you actually had a lot of arguments that you wanted to repeat, and you just wanted to change the first word, you could use !*, which expands to all words of the previous command except the zeroth.

See the “HISTORY EXPANSION” section of the bash man page. There is a lot of flexibility there.

接着是哈斯特的回答：

I would like to add a warning (see the answer from Spiff above). With !$, you do not have full visual control of the line you are running. The results can be harmful sometimes, especially if you incur a misprint. It takes what it needs from the history to expand on.

So if you write the last command with a blank space at the beginning, then this command will probably not finish from the history. When you execute your new command with !$, the shell will not take the parameters from the last command line typed, but only from the last part of the history.

Here are some more helpful words and commands.

jjlin的回答是：

Ctrl+a to go to the beginning of the line, then Alt+d to delete the first word.

古斯塔沃·吉拉德兹最后的回答是：

The delete word shortcut is actually Meta+d, and Meta is usually mapped to Alt on Linux machines. On platforms where this is not the case, an alternative to get the Meta modifier is to use Esc as a prefix. You can read more about the Meta Key here.

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