用文件中的 sed 替换部分 url [英] replace parts of url with sed in a file

问题描述

我有一个充满网址的文件，如下所示:

I have a file full of urls that looks like this:

https://testing/this/string/for/now

我需要专门使用 sed 将它们全部替换为:

which I need to have them all replaced using sed specifically, to:

https://testing/this/now

并在最后保存带有更新内容的文件.所以实际上删除'string' 和 'for' 中存在的任何内容(无论它们的长度如何)，但保留后一个 'now' 部分的 url.

and save the file at the end with the updated content. So actually remove whatever content exists in the 'string' and 'for'(no matter their length might be), but keep the latter 'now' part of the url.

提前致谢.

文森特

推荐答案

你可以使用这个 sed 命令删除 https://testing/this/ 后的 2 个路径:

You can use this sed command to remove 2 paths after https://testing/this/:

sed -i.bak 's|\(https://testing/this/\)[^/]*/[^/]*/|\1|'' file

说明:

\(https://testing/this/\)  # match and group https://testing/this/
[^/]*/                     # match 0 or more of any character that is not /
[^/]*/                     # match 0 or more of any character that is not /

作为替代，我们使用 \1，它是对第一个捕获组的反向引用.

In replacement we're using \1 which is back-reference to first capturing group.

示例:

s='https://testing/this/string/for/now'
sed 's|\(https://testing/this/\)[^/]*/[^/]*/|\1|' <<< "$s"
https://testing/this/now

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