Bash script to create multiple directories and Subdirectories

Question

I'm currently using the following two scripts to create multiple directories and subdirectories. The first script creates '/Dir1/Dir2' and the second script then adds multiple subdirectories to 'Dir2'.

#!/bin/bash
# Creates directories and subdirectories from text file
cat *.txt | xargs -L 1 mkdir -p 

#!/bin/bash
# Lists all directories in current working directory and create subdirectories 
LIST=`ls -D`
for i in $LIST;
do
mkdir -p $i"/Dir3/Dir4/"
done

I've combined the two script but the subdirectories Dir3 and Dir4 are created in Dir1 and not Dir2 as intended. With my very limited knowledge of scripting I'm unable to successfully search for the answer and therefore turn to you guys for assistance.

Answer 1

It is difficult to tell what you are trying to do but I think this does what you want:

#!/bin/bash

cat *.txt | while IFS= read -r line; do
    mkdir -p -- "$line/Dir3/Dir4"
done

This will read through all the .txt files in the current directory and make a folder with the path ./<line from file>/dir3/dir4.

If this is what you wanted to happen the reason it wasn't working is that $(ls -D) will only list the files in the current directory. It will not recurse down into sub-directories. So even if the first script created a dir1/dir2 directory the second script would only see the dir1 directory.