Question

I have 1.2 million files split out into folders, like so:

Everything
..........Folder 1
..................File 1
..................File 2
..................File 3
..................File 4
..................File 5 etc 
..........Folder 2
..................File 1
..................File 2
..................File 3
..................File 4
..................File 5 etc 

If I cd into Folder 1 I can run the following script to organize the files there into folders called 1, 2, 3, etc. of 1000 files each:

dir="${1-.}"
x="${2-1000}"

let n=0
let sub=0
while IFS= read -r file ; do
    if [ $(bc <<< "$n % $x") -eq 0 ] ; then
            let sub+=1
            mkdir -p "$sub"
            n=0
    fi

    mv "$file" "$sub"
    let n+=1
done < <(find "$dir" -maxdepth 1 -type f)

However I really would like to run it once on the Everything folder at the top level. From there it would consider the child folders, and do the by-1000 sorting so I could move everything out of Folder 1, Folder 2, etc. and into folders of 1000 items each called 1, 2, 3, etc.

Any ideas?

Edit: Heres how I would like the files to end up (as per comments):

Everything
..........Folder1
.................file1(these filenames can be anything, they shouldnt be renamed)
.................(every file in between so file2 > file 999)
.................file1000
..........Folder2  
.................file1001
.................(every file in between so file1002 > file file1999)
.................file2000

Every single possible file that is in the original folder structure is grouped into folders of 1000 items under the top level.

Answer 1

Let’s assume your script is called organize.sh, and the Everything folder contains only directories. Try the following:

cd Everything
for d in *; do
    pushd $d
    bash ~/temp/organize.sh
    popd
done

Update

To answer Tom’s question in the comment: you only need one copy of organize.sh. Say if you put it in ~/temp, then you can invoke as updated above.