-----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-rails-15.0-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-rails-15.0-stretch-amd64.iso 45d21e7646061af74eb26eb4f588ca051156e9f911eb25e7aabd05906e75c6df turnkey-rails-15.0-stretch-amd64.iso $ sha512sum turnkey-rails-15.0-stretch-amd64.iso 61ca4a01617dd0f93a8d0683a7b19bd35b6830d596fa0cf705660aaf81358ba608aae289c4ac19d650df58a2aadea65136f256be874ad0d3beb7f388593d6baf turnkey-rails-15.0-stretch-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-rails-15.0-stretch-amd64.iso.hash turnkey-rails-15.0-stretch-amd64.iso: OK $ sha512sum -c turnkey-rails-15.0-stretch-amd64.iso.hash turnkey-rails-15.0-stretch-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAluD9TsACgkQhcJelaFu uU3mEwf9G9WnFtW7EVvQDqR5cWNFqHpGvwYItMDOEG1P5twrjmroVg1poCkpg8u7 2vcq3KbKr8AhotduW5kSWNBd+xtuPmKYmj//MG03P5ndFwb7l37fDUR7VAA9NqeE +5e9H0RPRScIbRwycDewdVC5c3iBd0hGsWkkpD/025ZekRHKuxqMVphi9p1WpQh9 lfliuTQA6wnyAfNtA9rY00KsWotmmTwEVS0SVLKOVzl42Y/sf7KbGsil+yZcovbU EDxFMYg0ztbwwz2KvV8BMe7rX4AX3m91/HoBBZg3Ni14w0NDDctB5UtU981fyIdY L2G5hg0iTwkleayRkxd+oPubjFWPxA== =d8a1 -----END PGP SIGNATURE-----