Script to create random files in a directory

file_create.sh

#!/bin/bash

# Location
location=/mnt/data
# Start size in MB
start_size=100
# End size in GB - Note: Bash does not support floating point arithmetic, so we'll work with MB
end_size=$((100 * 1024)) # 100GB in MB
# Increment size in MB
increment=1024 # 1GB increment

for ((size = start_size; size <= end_size; size += increment)); do
    # Calculate the size in MB for files <1GB and in GB for others
    if [ $size -lt 1024 ]; then
        size_label="${size}MB"
    else
        gb_size=$(($size / 1024))
        size_label="${gb_size}GB"
    fi
    
    file_name="random_${size_label}.bin"
    # Using /dev/urandom to generate random data
    # bs=1M sets the block size to 1MB, count is how many of those blocks we want
    echo "Creating file $file_name of size $size_label"
    dd if=/dev/urandom of=${location}/${file_name} bs=1M count=$size status=progress
done

echo "File creation completed."