-----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-nextcloud-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-nextcloud-15.1-stretch-amd64.iso 405528615e8bc128fad00f2f9044d5d080485bf7a10a394138e8a63f09d7afc6 turnkey-nextcloud-15.1-stretch-amd64.iso $ sha512sum turnkey-nextcloud-15.1-stretch-amd64.iso d7f4d5019855ba957bb34f6764cdb0aad8c4c5be18a65a9b4b7968489b61cc7a6343a3e65191e9d658f937f3040744ad48cb2782165ba3d66ced5e71d7fe96cc turnkey-nextcloud-15.1-stretch-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-nextcloud-15.1-stretch-amd64.iso.hash turnkey-nextcloud-15.1-stretch-amd64.iso: OK $ sha512sum -c turnkey-nextcloud-15.1-stretch-amd64.iso.hash turnkey-nextcloud-15.1-stretch-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAlv/piwACgkQhcJelaFu uU0pjwf/cpFTRqNlMfokpYQv5YHwjkEgrLY9hHUtePuLuAdtBwICGFF4WdpC2qO5 tYzpv4s0+lCe2DRgnHJ895OdybwCjY6dkJks6mwHRnFl0yJ7qE5RlIzqOEG7kXAy leePcoEP6Js0DuiyYZoOLq1Hm+vN5Y3kAN4FmLDEihU0I+l7DnZGymg6IrNm3ALN y9Ipk/NzPQCLoT7Ocy6A/oNfenXuQj0f/mPdI7hX6ql2JqT1fhmpEw13LVnkICzi tjh5Eg9QU4rXDYjtz9RdNOm8js7kSRVw/9xFjargy3mQCF81CVf2FRQ1wP876x2K jKS+yVjrOE7P6rtpdYlL/BJzRoQOGA== =EAdL -----END PGP SIGNATURE-----