-----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-15.0-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-jenkins-15.0-stretch-amd64.iso 39c1e42e0192b19c1e618616e3ec21b547e4c2dd157316a7abd4e5431138c222 turnkey-jenkins-15.0-stretch-amd64.iso $ sha512sum turnkey-jenkins-15.0-stretch-amd64.iso d5713ce2d9f071575bc55680de258c184d9333db75d8726a4e3f2a1b27bae2afb194d558967ad115861ab4ada17197292ce3a85c01a715d32e1855efe20e2e3e turnkey-jenkins-15.0-stretch-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-jenkins-15.0-stretch-amd64.iso.hash turnkey-jenkins-15.0-stretch-amd64.iso: OK $ sha512sum -c turnkey-jenkins-15.0-stretch-amd64.iso.hash turnkey-jenkins-15.0-stretch-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAluD9ToACgkQhcJelaFu uU2jOAgAyc4IvEJmaP85+gLL7oizcTBRsxPL/qDSCZro5uPrslb1UeJszBNYXWyE uh4KEvHpd4Jo06Msoy9pVj1I3lX4Zd0Ge5yAAdUWQaolZ69zJ/WVuma1IfDlz5Xc 2m0dqrf5c699sfcqqnvCGfYRc/JGwHu23SLPQ8vbAklZ93xcelsGDYjvWQrYHrZk oSvo/vhsdE3x2ZvFFljD4ovnLCHu2zdtfAMMLcfMRryVzeRoNiUvK8AKLV2qJbBy MUK7u4di7b6E0jqrKaZDNIci9Gfln4vjcFWRMPkO700ODWG79PGSnEbGerZtRG1g eXDlh0EeSsjN5i1TQUr/EUK0YCECYQ== =rNgq -----END PGP SIGNATURE-----