Usage: sha256sum [FILES]...
Computes and prints the SHA-256 hash of each file.

  FILES   Specifies the paths to the files to hash.

Examples:
  sha256sum /halyde/apps/fetch.lua   Computes and prints the SHA-256 hash of fetch.lua in the /halyde/apps directory.
  sha256sum a.txt b.txt              Computes and prints the SHA-256 hashes of a.txt and b.txt in the current working directory.