Generate binary files with random content...and calculate their sha256

generate_files.sh

#!/bin/bash

#size magnitude
sizes=( "" "K" "M" )


for magnitude in "${sizes[@]}"; do
    for size in `seq 1 5 51`; do
        echo "Generating ${size}${magnitude}"
        head -c ${size}${magnitude} </dev/urandom >file-${size}${magnitude}.bin
    done
done

#generate sha256checksums
rm -f sha256checksums
find . -name "*.bin" -type f -exec sha256sum "{}" + > sha256checksums