Sed 与&；（安培）

正在尝试清理一些看起来像

Forest & Paper Products Manufacturing

使用sed命令，如

 sed "s/ \& / & /"

但是一旦sed处理完这个文件，我的输出看起来像

Forest & amp; Paper Products Manufacturing

不明白为什么sed在&

我可以用以下方法解决这个问题：

sed "s/ \& / \& /"

---

但是为什么我需要在替换部件中引用带有\前缀的&

，

&

表示匹配的字符串

\0

。所以，如果您想在替换部件中使用literal

&

，则必须对其进行转义

例如

从sed信息页面获取的相关信息：

   The REPLACEMENT can contain `\N' (N being a number from 1 to 9,
 inclusive) references, which refer to the portion of the match which
 is contained between the Nth `\(' and its matching `\)'.  Also, the
 REPLACEMENT can contain unescaped `&' characters which reference the
 whole matched portion of the pattern space

及

---

但是如果您事先不知道替换文本，如何用\&替换？我需要先替换替换文本，然后才能将其替换为sed？：D

   The REPLACEMENT can contain `\N' (N being a number from 1 to 9,
 inclusive) references, which refer to the portion of the match which
 is contained between the Nth `\(' and its matching `\)'.  Also, the
 REPLACEMENT can contain unescaped `&' characters which reference the
 whole matched portion of the pattern space

To include a literal `\', `&', or newline in the final replacement, be   
 sure to precede the desired `\', `&', or newline in the REPLACEMENT with 
 a `\'.