-----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 debian-9-turnkey-tomcat-apache_15.1-1_amd64.tar.gz.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 debian-9-turnkey-tomcat-apache_15.1-1_amd64.tar.gz 501fcadab2800ec124b491cd93bc883b3fb9589c640e2f31cafeda767cca9c28 debian-9-turnkey-tomcat-apache_15.1-1_amd64.tar.gz $ sha512sum debian-9-turnkey-tomcat-apache_15.1-1_amd64.tar.gz a8623fde17a01dfb224fe4fc4202272e4c9c71c4e8081ca918fe0c0309aa50882fbc44e79af41a0cb2fefe7e1a98b8fd5518502f6f25643ca5f68df373e3d77b debian-9-turnkey-tomcat-apache_15.1-1_amd64.tar.gz Note, you can compare hashes automatically:: $ sha256sum -c debian-9-turnkey-tomcat-apache_15.1-1_amd64.tar.gz.hash debian-9-turnkey-tomcat-apache_15.1-1_amd64.tar.gz: OK $ sha512sum -c debian-9-turnkey-tomcat-apache_15.1-1_amd64.tar.gz.hash debian-9-turnkey-tomcat-apache_15.1-1_amd64.tar.gz: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAlv/phMACgkQhcJelaFu uU0xPgf/TJ0q2haqfJGYmN+vsxjNdw+5RKuBWepNdaQNBJftzULzmsLJRH1XyXip HVH/dD7g9DAM3uNusDjNB6rZLIGs0OJ8+8P1bEn3RARmjtjKqiFXMki+tcKI64KA 25LStS+6XA5L+/GBYQy3SmWL+Qv6T2rdp6ESvdpTcV1lXgkiFnRrP2xGwZcdyzCj dHhkF3vbvmT7TeR8dSlroPsq8wTIXaTxHZPFhvGDP6hfwXmPzAVmyUkEzVLdPWou UbsOEvNTGskWcnG1CtgxY/IF0TAFa/GFpPoxCWLPoTR4FmibAcq8ZH5g0Rhm0vIV x7+Bm5vL+evhNdgFZw9knarb2SezOg== =XzPE -----END PGP SIGNATURE-----