Re: list of portable tools

[Karl Berry]

    As an extreme example, we can't assume 'shuf' (recently added to
    coreutils).  

Of course.

    'fold' and 'cut' are not nearly as extreme as that, but
    they do tend to be less-used in portable software.

Is there any modern (or even not-so-modern) system that does not provide
fold and cut?  I'd be greatly surprised.