> >> This lets you execute commands like:
> >>
> >>      auth/as
> ...

POSIX forbids this behavior, FWIW, so you'll probably have a hard time
> finding a shell -- at least one with POSIX aspirations -- that implements
> it.
>

So you write a function or alias that prepends the full path to "as" and
exec's the command.  So you have to type "auth as ..." but BFD.