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Hash: SHA256

To ensure the image has not been corrupted in transmit or tampered with,
perform the following two steps to cryptographically verify image integrity:

1. Verify the authenticity of this file by checking that it is signed with our
   GPG release key:

    $ curl https://keybase.io/turnkeylinux/pgp_keys.asc | gpg --import
    $ gpg --list-keys --with-fingerprint release@turnkeylinux.com
      pub   2048R/A16EB94D 2008-08-15 [expires: 2023-08-12]
            Key fingerprint = 694C FF26 795A 29BA E07B  4EB5 85C2 5E95 A16E B94D
      uid   Turnkey Linux Release Key <release@turnkeylinux.com>

    $ gpg --verify turnkey-web2py-15.1-stretch-amd64-xen.tar.bz2.hash
      gpg: Signature made using RSA key ID A16EB94D
      gpg: Good signature from "Turnkey Linux Release Key <release@turnkeylinux.com>"

    For extra credit you can validate the key's authenticity at:

      https://keybase.io/turnkeylinux

2. Recalculate the image hash and make sure it matches your choice of hash below.

    $ sha256sum turnkey-web2py-15.1-stretch-amd64-xen.tar.bz2
      4a08df1f381ac42c83a82b5970b1c94185358a7b0c4da665f8611878a99da60f  turnkey-web2py-15.1-stretch-amd64-xen.tar.bz2

    $ sha512sum turnkey-web2py-15.1-stretch-amd64-xen.tar.bz2
      b5de9ef981debd79759343ce55121481cd87f0fbeccd40672b5e3c2e8a05d60caf6da61901e939144cc07c5ed6ef1b79d9623ca667eccf1cd2c1e71a2e157d11  turnkey-web2py-15.1-stretch-amd64-xen.tar.bz2

   Note, you can compare hashes automatically::

    $ sha256sum -c turnkey-web2py-15.1-stretch-amd64-xen.tar.bz2.hash
      turnkey-web2py-15.1-stretch-amd64-xen.tar.bz2: OK

    $ sha512sum -c turnkey-web2py-15.1-stretch-amd64-xen.tar.bz2.hash
      turnkey-web2py-15.1-stretch-amd64-xen.tar.bz2: OK

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