-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

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://raw.githubusercontent.com/turnkeylinux/common/18.x/keys/tkl-bookworm-images.asc | gpg --import
    $ gpg --list-keys --with-fingerprint release-bookworm-images@turnkeylinux.org
      pub   rsa4096 2023-05-22 [SC] [expires: 2043-05-17]
            2614 7592 087C 0EDE 4214  3B63 7761 DEBA BBCF BA7C
      uid           [ unknown] TurnKey GNU/Linux Bookworm Images (GPG signing key for TurnKey Linux Bookworm Images) <release-bookworm-images@turnkeylinux.org>
      sub   rsa4096 2023-05-22 [S] [expires: 2043-05-17]
      
    $ gpg --verify turnkey-mattermost-18.0-bookworm-amd64.iso.hash
      gpg: Signature made using RSA key ID 26147592087C0EDE42143B637761DEBABBCFBA7C
      gpg: Good signature from "0"

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

    $ sha256sum turnkey-mattermost-18.0-bookworm-amd64.iso
      760ae8188a4a67187f8bad329880da51f9cfe6c22bb140580af7178d559bab6b  turnkey-mattermost-18.0-bookworm-amd64.iso

    $ sha512sum turnkey-mattermost-18.0-bookworm-amd64.iso
      b18d42b6a4dc82f8a14dc8763e31b42ecde4d42563ccf3a3b173ba23b366ef30522ed07246201f6f05c67aa00a139cfa1c67573630cd898b83ba296bfcd85320  turnkey-mattermost-18.0-bookworm-amd64.iso

   Note, you can compare hashes automatically::

    $ sha256sum -c turnkey-mattermost-18.0-bookworm-amd64.iso.hash
      turnkey-mattermost-18.0-bookworm-amd64.iso: OK

    $ sha512sum -c turnkey-mattermost-18.0-bookworm-amd64.iso.hash
      turnkey-mattermost-18.0-bookworm-amd64.iso: OK

    Final note, when checking SHAs automatically, please ignore warning noting that some lines are improperly formatted.

-----BEGIN PGP SIGNATURE-----

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GfmEUmvNK4c1sCn3MZOUUdpWvkYGsSrt8A4HqJc1sQ0eTmlBfFdhFquyB/9BClIX
hDsCNush7E1mUpbPF5v4BCpaSN6vnaNlputDHvhNeBdA12Uj8YshQwdUdJ884XpH
6wLwOrosWpsrFn/PaEGmXqwfA2tdsLmpklVB2qS1IYrp/78uA8Pi5ImnH3tRmwfy
6pWAt5/VFtHt1Na8+fIgk3WA/rJt76Vv4gf4McACD19Wt1cvLPl6/nYcQcsBeg0R
HV1rOEeFRmTb2Ekj1c64wGAqh5JbuWDswTxpbPyWb2covwCOuFtAs1K7YncKkRcm
YNB7aFAGu77xippLy+i9n7HhCNRGh/NbuCJiUApFXu1PhHut+vWcN+dnkwiu5Wwo
n+MrK4UKW75xtKY/FpuI/LhRJIXcmFOoTRs2FFMvlAQ7Yig6T4VMPmtF3U5A72Ld
yXYMh7q2QVq52Yt0xKNnHO40mRhW+Y/uQVkorIpVWgKmhaknwaNSfVO7+na8N2Uz
NtypOeuy1L481OOw2VL+7UqHyaozvDQiBimvViyuCHY8/UFC0mk=
=R7yY
-----END PGP SIGNATURE-----