-bash：＆QUOT;：事件未找到
我该如何解决这个问题的bash终端？为什么会产生！突然成为一个问题，以及需要引号似乎不再是必要的，以产生该字符串。难道我碰坏？如果让我怎么恢复成出厂设置？我敢肯定，这是正常的工作昨天
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
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：！：找不到事件，这是奇怪的。
运行
set +H
将关闭其全部违规（历史扩展）功能。在此把你的〜/ .bashrc中是一种常见的做法。
另外，你可以修改 histchars 变量来改变用来触发历史扩展（默认字符，！），快速替换（默认情况下， ^ ）和评论（默认情况下，＃）。
Alternately, you can modify the histchars variable to change the characters used to trigger history expansion (by default, !), quick substitution (by default, ^) and comments (by default, #).
作为另一种选择，采用单而不是双引号避免了引发问题的壳特征。
As yet another option, using single- rather than double-quotes avoids triggering the shell feature in question.