Since Apple spent so much effort in getting certified: https://www.opengroup.org...

		chasil 11 hours ago \| parent \| context \| favorite \| on: Useful built-in macOS command-line utilities Since Apple spent so much effort in getting certified: https://www.opengroup.org/openbrand/register/ These are all guaranteed to work: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/ (I may not have linked to the precisely correct version.)