如何查找所有没有相同名称但扩展名不同的匹配文件的文件 [英] how to find all files that dont have a matching file with the same name but different extension

问题描述

我有一个包含超过 100 万个文件的文件夹.这些文件成对出现，只是扩展名不同(例如 a1.ext1 a1.ext2、a2.ext1、a2.ext2 ...)

i have a folder with over 1 million files. the files come in couples that only differ by their extension (e.g. a1.ext1 a1.ext2, a2.ext1, a2.ext2 ...)

我需要扫描这个文件夹并确保它满足这个要求(文件耦合)，如果我发现一个没有匹配的文件，我应该删除它.

i need to scan this folder and make sure that it fulfills this requirement (of file coupling), and if i find a file without its match i should delete it.

我已经用 python 完成了，但是在处理 7 位数的文件时速度非常慢..

i've already done it in python, but it was super slow when it came to working with the 7-figure number of files..

有没有办法使用 shell 命令/脚本来做到这一点?

is there a way to do this using a shell command/script?

推荐答案

基于另一个答案，您可以使用这样的脚本(它应该在文件所在的同一目录中，并且应该在那里执行):

Building on another answer, you could use script like this (it is supposed to be in the same directory where files are located, and should be executed there):

#!/usr/bin/env bash 
THRASH=../THRASH
mkdir "$THRASH" 2> /dev/null

for name in $(ls *.{ext1,ext2} | cut -d. -f1 | sort -u); do
    if [ $(ls "$name".{ext1,ext2} 2> /dev/null | wc -w) -lt 2 ]; then
        mv "$name".{ext1,ext2} "$THRASH" 2> /dev/null
    fi;
done

您可以通过修改 THRASH 变量来配置将没有配对的文件移动到何处.

You can configure where to move files that doesn't have their pair by modifying THRASH variable.

在具有 3.0 GHz 和 2 GB RAM 的双核 Pentium 上，一次运行需要 63.7 秒(10000 对，文件夹中每对成员约有 1500 对).

On dual core Pentium with 3.0 GHz and 2 GB of RAM one run took 63.7 seconds (10000 pairs, with about 1500 of each member of the pair missing from the folder).

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