如何将特定文件从目录复制到新目录 zsh

Question

I have a list of file names contained within a text file (a.txt). I want to extract from a directory (b) the files listed in a.txt to a new directory (c). The syntax of the filenames in a.txt and b match. The files in a.txt are empty and the files in b contain the json message of interest.

For example, the contents of a.txt look like:

ML3DBHCN___005.json
OCO2_L2_Standard___10r.json
GPM_3IMERGM___06.json 

and b :

b/ML3DBHCN___005.json
b/OCO2_L2_Standard___10r.json
b/GPM_3IMERGM___06.json 

Do i need to write a small .sh file that iterates through a.txt and extracts from b or can this be completed at once via command line?

Answer 1

If you know the filenames don't contain whitespace or wildcard characters, you can do it as a simple one-liner:

cp $(<a.txt) b/

If they can contain special characters, you can read them into an array:

readarray files <a.txt
cp "${files[@]}" b/

Answer 2

如果您想将a.txt中命名的文件从b移动到c （并且它们没有空格或通配符）：

(cd /path/to/b && mv $(< /path/to/a.txt) /path/to/c/)