在bash脚本中的文件扩展名之前附加一个字符串 [英] Appending a string before file extension in bash script

问题描述

我需要在bash脚本中的文件扩展名前添加一个数字.例如，我想将文件名" abc.efg "转换为" abc.001.efg "，问题是我不知道它是什么.文件的扩展名(它是脚本的参数之一).

I need to add a number just before the extension of the files in a bash script. For example, I want to convert a file name name like "abc.efg" to "abc.001.efg. The problem is that I don't know what is the extension of the file (it is one of the parameters of the script).

我一直在寻找最快的方法.

I was looking for the quickest way of doing this.

预先感谢

推荐答案

您可以执行以下操作:

extension="${file##*.}"                     # get the extension
filename="${file%.*}"                       # get the filename
mv "$file" "${filename}001.${extension}"    # rename file by moving it

您可以在在bash中提取文件名和扩展名的绝佳答案中查看有关这些命令的更多信息.

You can see more info about these commands in the excellent answer to Extract filename and extension in bash.

$ ls hello.*
hello.doc  hello.txt

让我们重命名这些文件:

Let's rename these files:

$ for file in hello*; do ext="${file##*.}"; filename="${file%.*}"; mv "$file" "${filename}001.${ext}"; done

塔尚...

$ ls hello*
hello001.doc  hello001.txt

这篇关于在bash脚本中的文件扩展名之前附加一个字符串的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！