-----BEGIN PGP SIGNED MESSAGE----- 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 $ gpg --verify debian-9-turnkey-observium_15.0-1_amd64.tar.gz.hash gpg: Signature made using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key " 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 debian-9-turnkey-observium_15.0-1_amd64.tar.gz 620a8b30b222cde61d77d918bdab7d7f9a423837a39fd8a3b843dde3fd756096 debian-9-turnkey-observium_15.0-1_amd64.tar.gz $ sha512sum debian-9-turnkey-observium_15.0-1_amd64.tar.gz 38544580e33a9afc4e2c961adf90c4495f14edd0f4948942fab95bbb7dcab04db0121f9399df44ae07b9dc58c851b80c7d1ca8c3fc5cd09489abcaffd55ffebf debian-9-turnkey-observium_15.0-1_amd64.tar.gz Note, you can compare hashes automatically:: $ sha256sum -c debian-9-turnkey-observium_15.0-1_amd64.tar.gz.hash debian-9-turnkey-observium_15.0-1_amd64.tar.gz: OK $ sha512sum -c debian-9-turnkey-observium_15.0-1_amd64.tar.gz.hash debian-9-turnkey-observium_15.0-1_amd64.tar.gz: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAluM+9gACgkQhcJelaFu uU1KmAf+IIN4l5iIh9tesTQ3YEcMPG6jrIx2yMFuc1epO9mb9zANetKbji9T77cE e3zHAXOfcDmNdVaphOBJj50T87EEQ2AsNYoTGCaGDf1slU+B9L0craml+eUxMvUh O76PgRnUc6WnlC0AbExwqwVMXMjFo84BWsI4AcA6P4AR4EUKM+RMESHoEnDc7LAw iOXmUqC969G25bGl6Ks5ysPn4qV5khR67/STH+/gvTKcCl/oqKlyJ795S/Ge2yVW Ik68/IzT1TG+OEXXjJ21CqN2nJKjXvnKfPO9EGrq2HA0l61qQZtQ+a6+/CAzMeGr OlTq6Ql1oPBpW98ByGdM/hHs6s2rng== =8xPC -----END PGP SIGNATURE-----