有时候你想在一个目录的所有子目录下批量建立文件夹，并且批量的运行这些子目录内新建立好的文件夹内的 IDL 程序，以下是一种可能的解决途径，如果你有更好的方法，欢迎告诉我

Here are the things I want to do:

1.  I have a data folder containing many sources, like Arp220, NGC981, etc.. Each of them possesses a folder under the whole data folder (./source/Arp220, ./source/NGC891, …). I want to create a subfolder named “plot” under each sources folder, e.g., ./source/Arp220/plot.
2. And then I want to copy the IDL routine to each “plot” folder I just created and run all the PRO routines at one time.

Here is a bash script being able to do such things:

#!/bin/bash
for i in $(ls -d */); do mkdir -p $i/'plot'; done
for i in $(ls -d */); do cp ./r_name.pro $i/'plot'/; done
for i in $(ls -d */); do cd $PWD/$i/'plot';idl -e ".r ./r_name.pro"; cd ../.. ; done

The first line means creating a “plot” folder under all the subfolders under you present folder. And the next line is to copy the IDL routine (r_name.pro) to each “plot” folder you created. The last line runs all the IDL routines.

顺便再提一个操作，即“批量删除某个目录下所有子目录中包含”X”关键词的文件”。这个可以用一句话可以解决：

find ./* -type f|grep X|while read file; do rm "$file"; done

比如你要删除“./you suck/arXiv.pdf“这种文件。上面那句话中 -type f|grep X|while read file 是为了保证有空格的目录也可以被写入到一个变量里面。

在一些大神的提示下，我学到了更简单的做法，比如：

find ./* -type f -name "*X*" -exec rm {} \;