cp, mv --test: brilliant idea

[Dan Jacobson]

Whereas one often is unsure or forgets how
$ cp -some_flags some/big/tree some/other/big/tree
might turn out, it seems a very good idea to give cp a --test switch
to print what would happen without actually doing anything.

Sure you all might be experts, but I always end up with files stuck up
the armpits where I didn't expect it, so it would be nice to see what
they will be called before they are created.  The same thing even more
so with mv.

Sure you might have a magic rule to remember, or RTFM with ease, but
not me.

Anyway, it would be good to see what cp or mv has to say about what it
plans to do with whatever arguments I give it, with out having to pay
a price for asking.
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