mjhjmtu

Here's a sample output what it should look like when the bash script is executed --> https://imgur.com/jfuKEdf .

My question is about how do we make this or what code can I use?

for dir in a a/b a/b/c a/b/c/d; do
 mkdir "$dir" && touch "$dir/$dir##*/"1..100
done

That is, loop through the directory names that we'd like to create, and for each directory:

1. create it, and


2. create empty files in it.

$dir##*/ will expand to the basename of the directory in $dir, e.g. to c if $dir is a/b/c. The brace expansion something1..100 will expand to something1 something2 ... something100.

A variation that is easier to expand to an arbitrary depth:

dir=''
for dirname in a b c d; do
 dir="$dir:-./$dirname"
 mkdir "$dir" && touch "$dir/$dir##*/"1..100
done

Here, $dir:-. will be replaced by . if $dir is unset or empty, which it will be on the first iteration. This means that $dir will be built up to be first ./a, then ./a/b etc.

If you want further subdirectories, e.g. all the way down to z:

dir=''
for dirname in a..z; do
 dir="$dir:-./$dirname"
 mkdir "$dir" && touch "$dir/$dir##*/"1..100
done