On 2022-12-13 at 17:56:45 +0000, Ralph Corderoy <ralph@xxxxxxxxxxxxxxx> wrote: > > well, maybe. > > My point was to show it's subjective. Fair enough. On that we agree. > > Now who told tar and ps that they don't need the dash? ;-) > > Someone who created the dash to show the argument contained optional > options rather than a filename. If they're not optional then the dash > isn't required. :-) I'll give that to you for tar, but the options are ps are, in fact, optional.