How can i copy the data from subdirectories to one level above using Linux

Question

I have the directory and file structures like below.

path/A/1/a/11.txt
path/A/1/a/12.txt
path/A/2/a/21.txt
path/A/3/a/31.txt

I want to copy these files to another path but one level above. Please note sub-directory "a" is not available in the new path.

path2/A/1/11.txt
path2/A/1/12.txt
path2/A/2/21.txt
path2/A/3/31.txt

Since i have multiple directories and under which i have multiple files like these, i cannot simply use the command given below

cp -R path/A/1/a/*.txt path2/A/1/

Looking for inputs. Thanks

Answer 1

I'd use a loop:

from=some/path
to=some/other/path2

for dir in "$from"/A/*/; do
  dest=${dir/#$from/$to}
  mkdir -p "$dest"
  cp -v "$dir"/*/*.txt "$dest"
done

Note the trailing slash in the pattern in the for command: that restricts the results to directories only.