-bash: !": 事件未找到
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-bash: !": event not found
提问by Michel Frechette
How do I fix this bash terminal? Why would the '!' suddenly be a problem and the need for quotation marks are no longer seem to be necessary to produce the string. Did I break something? If so how do I reset it to factory setting? I'm sure it was working properly yesterday
如何修复这个 bash 终端？为什么会“！” 突然成为一个问题，似乎不再需要引号来产生字符串。我是不是弄坏了什么东西？如果是，我如何将其重置为出厂设置？我确定它昨天工作正常
Last login: Sat Oct 18 15:30:48 on ttys001
Michels-MacBook-Pro:~ michelfrechette$ echo "hello, world!"
-bash: !": event not found
Michels-MacBook-Pro:~ michelfrechette$ echo hello, world
hello, world
Michels-MacBook-Pro:~ michelfrechette$ echo "hello, world"
hello, world
-bash: !": event not found, this is curious.
-bash: !": event not found，这很好奇。
回答by Charles Duffy
Running
跑步
set +H
will turn off the offending (history expansion) functionality in its entirety. Putting this in your ~/.bashrcis a common practice.
将完全关闭违规（历史扩展）功能。把它放在你的身上~/.bashrc是一种常见的做法。
Alternately, you can modify the histcharsvariable to change the characters used to trigger history expansion (by default, !), quick substitution (by default, ^) and comments (by default, #).
或者，您可以修改histchars变量以更改用于触发历史扩展（默认为!）、快速替换（默认为^）和注释（默认为#）的字符。
As yet another option, using single- rather than double-quotes avoids triggering the shell feature in question.
作为另一种选择，使用单引号而不是双引号可以避免触发相关的 shell 功能。
