-----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-jenkins-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-jenkins-15.1-stretch-amd64.iso 1f9ad74e05095bff7dc8a66af8da0db74cba4453feffbf40ea47ebcda8dfab15 turnkey-jenkins-15.1-stretch-amd64.iso $ sha512sum turnkey-jenkins-15.1-stretch-amd64.iso d75d1ea9a53fd4dae8fe5d6a9830bc820dbdd269a413f43d274ef91649d3f81690faf18880786c738cfa73da4d7b65a4f7d90a26bf7a3b3a962e7db75c129e85 turnkey-jenkins-15.1-stretch-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-jenkins-15.1-stretch-amd64.iso.hash turnkey-jenkins-15.1-stretch-amd64.iso: OK $ sha512sum -c turnkey-jenkins-15.1-stretch-amd64.iso.hash turnkey-jenkins-15.1-stretch-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAlvITPMACgkQhcJelaFu uU04gwgA0w+h4l96s+rBN+OQxqNU4Jv7pa0eDqBSqBeI6VQoOFVbJi4pGMpL1xG7 t7Tak5lkuZS7vTlQjRd8tiv/npvgoq5DfiaUddLJiW0Kdl0h+Mg6LeXJhfYJL1bH Kjx+qAmzDV1a1+P6JCe1EhJOHbjKc96YeCCeSwx9A7ReEK5j/5mCojumJfnOgXad 2wDPOy7xdgW/JfeMVJgRjmPITyENWss6V6p6Qv4ELTacl5sDc0jRi4yq+rwCmk+L XN6oHN/TaR5FcrwD6fAV7jPnFV6jS5KpxiXppjQEB7PI7rzxg+a2KETuaZPp/2Aw VJQqrFxQ9qmGFDj5V59OZIFgIPDCKw== =MF7t -----END PGP SIGNATURE-----