ed的答案是:

printf "%s\n" '1,$s/STRING_TO_REPLACE/STRING_TO_REPLACE_IT/g' w q | ed index.html

为了重申codaddict的回答，shell首先处理重定向，清除“input.html”文件，然后调用“sed”命令，向其传递一个现在为空的文件。

使用sed的-i选项，例如:

sed -i bak -e s/STRING_TO_REPLACE/REPLACE_WITH/g index.html

警告:这是一个危险的方法!它滥用了linux中的i/o缓冲区，通过特定的缓冲选项，它可以处理小文件。这是一件有趣的奇事。但是不要在真实的情况下使用它!

除了sed的-i选项 您可以使用tee实用程序。

从男人:

Tee -从标准输入读取并写入标准输出和文件

所以，解决方案是:

sed s/STRING_TO_REPLACE/STRING_TO_REPLACE_IT/g index.html | tee | tee index.html

-- here the tee is repeated to make sure that the pipeline is buffered. Then all commands in the pipeline are blocked until they get some input to work on. Each command in the pipeline starts when the upstream commands have written 1 buffer of bytes (the size is defined somewhere) to the input of the command. So the last command tee index.html, which opens the file for writing and therefore empties it, runs after the upstream pipeline has finished and the output is in the buffer within the pipeline.

下面的方法很可能行不通:

sed s/STRING_TO_REPLACE/STRING_TO_REPLACE_IT/g index.html | tee index.html

-- it will run both commands of the pipeline at the same time without any blocking. (Without blocking the pipeline should pass the bytes line by line instead of buffer by buffer. Same as when you run cat | sed s/bar/GGG/. Without blocking it's more interactive and usually pipelines of just 2 commands run without buffering and blocking. Longer pipelines are buffered.) The tee index.html will open the file for writing and it will be emptied. However, if you turn the buffering always on, the second version will work too.

您应该尝试使用-i选项进行就地编辑。

sed -i.bak "s#https.*\.com#$pub_url#g" MyHTMLFile.html

如果你有一个链接要添加，试试这个。按照上面的方法搜索URL(这里以https开始，以。com结束)，并将其替换为URL字符串。我在这里使用了一个变量$pub_url。S表示搜索g表示全局替换。

真的有用!

当shell在命令行中看到> index.html时，它会打开文件index.html进行写入，删除之前的所有内容。

要解决这个问题，你需要将-i选项传递给sed，以便内联更改，并在它执行更改之前创建原始文件的备份:

sed -i.bak s/STRING_TO_REPLACE/STRING_TO_REPLACE_IT/g index.html

如果没有.bak，该命令将在某些平台上失败，例如Mac OSX。