grep命令删除所有dirs，而不仅仅是dirs匹配正则表达式？
我正在玩Linux / grep命令，并且正在创建一个“清理”bash脚本，它将删除不匹配特定正则表达式模式的目录。
该命令是： ls | grep -v "[([a-zA-Z]){0,}]/g" | xargs -d"n" rm -rf ls | grep -v "[([a-zA-Z]){0,}]/g" | xargs -d"n" rm -rf
并且图像中没有突出显示的所有目录名称应该是被删除的目录名称; 但是，上述命令最终会删除当前目录中的所有文件夹/文件
我的正则表达式模式或管道命令的方式有问题吗？ 我尝试删除rm -rf ，但是结果是根本没有被删除。
正则表达式模式匹配目录名称，如下所示： 
以下是我在http://regex101.com上用于测试的一组目录名称
Challenge #96 [difficult] (Water Droplets)/
Challenge #96 [easy] (Controller Chains)/
Challenge #96 [intermediate] (Parsing English Values)/
Challenge #99 [difficult] (Animated unemployment map of the United States)/
Challenge #99 [easy] (Words with letters in alphabetical order)/
Challenge #99 [intermediate] (Unemployment map of the United States)/
Challenge 208 [Bonus] The Infinite Stallman Theorem/
Challenge#172 [Intermediate] Image Rendering 101...010101000101/
Challenge#180 [Easy] Look'n'Say/
Contest #1 - IDE Intellisense/
EXTENSIONS: Week-Long Challenge #1 due FRIDAY!
Honour Roll #1/
New moderator needed/
News, Mods, getting Wiki with it/
REMINDER: Week-Long Challenge #1 due today!
There are gonna be some changes here/
This isn't a challenge, just a thank you/
WINNERS: Week-Long Challenge #1
WINNERS: Week-Long Challenge #2
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We need some feedback!/
Week-Long Challenge #1: Make a (tiny) video game!
[Discussion] Challenge tags [Easy] [Intermediate] [Hard]/
[Easy] Longest Two-Character Sub-String/
[Extra] Poetic Justice/
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[difficult] challenge #1/
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challenge #3 [difficult]/
cleanup-clone.sh*
cleanup.sh*
for the artistically inclined... Have something extra!
是的，你的正则表达式是错误的。 以下命令适用于我：
ls | grep -v "[[a-zA-Z]*]" | xargs -d"n" rm -rf
请参阅grep命令，使用g修饰符是没有意义的，因为grep只在每次正则表达式模式中输入一行。 另外， {0,}与*量词相同。
提示 ：在尝试删除所有目录之前，根据您的设置，可能会有麻烦，只需运行匹配命令的反转命令即可：
ls | grep "[([a-zA-Z]){0,}]/g"
这样你就会知道不会被删除的目录列表。 在你的原始正则表达式中，列表是空的。
这个命令会保存比图像中显示的更多的目录，因为你的正则表达式不仅仅匹配这些目录，而且我敢打赌你已经知道了。 你可以在这里看到匹配目录的整个列表。
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