Les Stott wrote:
> tar -cvf /dev/null
>
> the tar to /dev/null actually doesn't take that long at all, maybe a few
> minutes depending on the size.
Gnu tar actually recognizes if stdout is connected to /dev/null (even if
you redirect instead of specifying -f) and doesn't bother to read the
file contents. I think that was an optimization intended to be used
with --totals for amanda's estimate runs that it uses to make the mix of
full/incrementals fit on the tape. I guess it works with -v too.
--
Les Mikesell
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