-----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 turnkey-moodle-15.1-stretch-amd64.iso.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 turnkey-moodle-15.1-stretch-amd64.iso 4e32ec70451afc800711678b9c78b52a942970f92c26b4bd143768015312133f turnkey-moodle-15.1-stretch-amd64.iso $ sha512sum turnkey-moodle-15.1-stretch-amd64.iso f9dec6444c1c1019a47ed769a3f82b3ea39fdf4481b7f78ef483991c9541fbf65f5866113980aeb1456c42502d4e51b86f32899f95c344fbc1dfd3d9328991c0 turnkey-moodle-15.1-stretch-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-moodle-15.1-stretch-amd64.iso.hash turnkey-moodle-15.1-stretch-amd64.iso: OK $ sha512sum -c turnkey-moodle-15.1-stretch-amd64.iso.hash turnkey-moodle-15.1-stretch-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAlv/pioACgkQhcJelaFu uU30rwf/ZQX0KM+nGVZTXgN8ilRuOjyBLlNX/CspdEzQ6S3C7k4Lnw29p6IkAMS3 kolvYrTxzFxssxQ0U7uPtTC22TzBVOCexqN9jHK3326gFucffLNzrKFqwG52mrVv C248dgQLEof2+/uV9HpzP5tTh+qNZfQNuP58a6M6bPhhgbhELRXpCdof7h3s4D8Q x+PNZjJWjpdmu7yGl2RwCqMkJl3x+hRlI8qYNbFrdWqaZuhydDmQpo95OxkpQOd9 aDjIEERyx8iUt4bR+hwNaFu/3/AJY82GdU/IawY8mSy9kwHty2FzffJlUAzuJHay y0wuVOA2mseSML44gU5Yeb706F0KiQ== =Qyrb -----END PGP SIGNATURE-----