-----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-tomcat-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-tomcat-15.1-stretch-amd64.iso f6efb6a9a011eca4c43ab7fb7b6dfffc4269f890087d4e99222fe3b032dcdb32 turnkey-tomcat-15.1-stretch-amd64.iso $ sha512sum turnkey-tomcat-15.1-stretch-amd64.iso 7ddab7ecaa1f93daf2bd3fd9def6832b6a0e3dc8d00e084530337d57e49af3fa4b0f3efd6db8e3b32aceb8eb1ec7b07a970101e002623684b23772ef8eca9a9e turnkey-tomcat-15.1-stretch-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-tomcat-15.1-stretch-amd64.iso.hash turnkey-tomcat-15.1-stretch-amd64.iso: OK $ sha512sum -c turnkey-tomcat-15.1-stretch-amd64.iso.hash turnkey-tomcat-15.1-stretch-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAlv/pjoACgkQhcJelaFu uU2BUggAo3TA40bfLJRhbMLkhEztALcpEb1oUrEYUAkiT+uaf6Fme1pbKD1NhrqZ 6ivVcqmul1CAx+WszB3WY7ERNCSHDYC3k7TgqJTnxRPDwkDsw3KSmazyRXwywRsC Dog+YWNwmHVdLNty7n0Eh8S0xpuPfIE6tvGs9i+0lgrRqvdiQ5Zqc5LUgB2E69Ua v4Fj8cUuj25yDw0/UStGYXQmylORyXa1vVJudeC9pVS5edPAfvNKkmSQd24Gc260 nLCkAMTWnOc6aEQ1EZ4MhXCxXRzOxzJYbIGImqPKahZNeisuOc9DpFjYtsgFMizN daZzq0/+qoWkcGnSRSIyFEI2vXdtIw== =gUZH -----END PGP SIGNATURE-----