create random files

create_random_files.sh

#! /bin/bash

numberOfDirs=10
numberOfFiles=10
blockSize=100

for d in $(seq 1 $numberOfDirs); do
    mkdir dir$(printf %03d "$d")
    for n in $(seq 1 $numberOfFiles); do
        dd if=/dev/urandom of=dir$(printf %03d "$d")/file$(printf %03d "$n").bin bs=$blockSize count=$((RANDOM + 1024)) 2> /dev/null
    done
done