-----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-mediaserver-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-mediaserver-15.0-stretch-amd64.iso 058ddaf808bf625a2a1253c21e7a95ae18c1857187dce2600e29334b60e4d2e1 turnkey-mediaserver-15.0-stretch-amd64.iso $ sha512sum turnkey-mediaserver-15.0-stretch-amd64.iso 0b735a6e8f29302e06271c98e89908cdb99fab332487ac009e5720cdc1ae9d0381a3cb11ca754e540337fccb3314ea498878d18080af6ea8810582e5ea136057 turnkey-mediaserver-15.0-stretch-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-mediaserver-15.0-stretch-amd64.iso.hash turnkey-mediaserver-15.0-stretch-amd64.iso: OK $ sha512sum -c turnkey-mediaserver-15.0-stretch-amd64.iso.hash turnkey-mediaserver-15.0-stretch-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAlvITPcACgkQhcJelaFu uU2heAgAj+XjLC2Q+wFaTecl86+sAxssHpykKc1bgXNeTln4EGeoCka9KfptRlHQ Pp5fP3eiKRsTvcWSYtCdWO6NMBtqUvNj2F78wJSo3blK1VfesvhaAS+1iLCDVW2b x3NN/2N/GzHxk76MMsRvASfCbycqIfUqgqubrkq6y1mCIvM+0j+ufvNKvn/dkwtD EZ9e7oj1uJq/isY3oeAayr3392WGnPbGx+VKR/smqxdSBp9uNS4F7GDPChg2nY1r wPJck6JLDK5hjcj/ow1+/JPfmvKVTNFRXN1qJiZ8CaSJ6XxKbDz6lF5DBa/X8Tgu /wQ/XznhufPBHFRLQ9Nlh0MTJ8xiJQ== =wqNu -----END PGP SIGNATURE-----