for循环进行多个扩展，并对每个文件执行操作 [英] for loop for multiple extension and do something with each file

问题描述

我试图在bash中编写一个for循环，以获取扩展名为jpg，jpeg，png的文件，这是我的尝试，但不起作用

I'm trying to write a for loop in bash to get the files with extension of jpg, jpeg, png, this i my attempt, but does not work

for file in "${arg}"/*.{jpg,jpeg,png}; do echo ${arg}-something.jpg > z.txt ; done;

基本上，我想获取当前文件夹中具有这些扩展名的文件的名称，并对每个文件进行处理，然后以新扩展名的形式输出文件名.

basically, i want to get the name of the file with those extension in the current folder, and do something with each file, then output the filename back with a new extension.

推荐答案

您没有在任何地方使用$file.试试

You are not using $file anywhere. Try

for file in "$arg"/*.{jpg,jpeg,png} ; do
    echo "$file" > z.txt
done

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