A. Dumas  wrote:
>
> http://lmgtfy.com/?q=raspberry+upgrade+jessie+stretch
>
> First hit:
> https://www.raspberrypi.org/blog/raspbian-stretch/
>
> Summary:
> Don?t upgrade! Do a fresh install.

To that end, I've downloaded the latest raspbian-stretch.zip and would like
to write a microSD to try out the new system. Is there a way to uncompress
the archive and pipe it to dd or an equivalent program to write the image
to a spare card? The default Xarchiver on Raspbian seems inclined to extract
the contents piecemeal, rather than as a disk image.

What I expected to use was something like
sudo unzip -p *.zip | dd of=/dev/sdc
but that gives a permissions error, then reports an archive error after the
password is entered.  The archive is a little over half a gig, which seems
reasonable for a sparse image. The machine has only 3.5GB of free space,
so I'd rather not write the image to the host's storage if I can help it.

I'd like to complete the operation using Raspbian only.
What's the trick I'm missing?

Thanks for reading,

bob prohaska

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