Rename a file to sha512 hash of any string.

main.sh

# This command renames files.
find ./ ! -name '*.DS_Store' -type f -print0 | xargs -0 -L1 sh rename_sha512.sh

rename_sha512.sh

#!/bin/sh
# This program renames a file.
# The file name is sha512 hash of any string.

file_name=${1:-""}
if [ ! -f "${file_name}" ]; then
	echo "No such file." >&2
	exit 1
fi

base_dir=$(dirname "${file_name}")

# openssl sha512 "${file_name}" => SHA512(.//file_name)= 6790faba734484b...
hash=$(shasum -a 512 "${file_name}" | awk -F' ' '{print $1}')

mv -iv "${file_name}" "${base_dir}/${hash}.${file_name##*.}"