-----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-espocrm-15.2-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-espocrm-15.2-stretch-amd64.iso a7ba6b517de7905064617fa18dca74b44625e02567f743d9198fec322a16168a turnkey-espocrm-15.2-stretch-amd64.iso $ sha512sum turnkey-espocrm-15.2-stretch-amd64.iso 99c8fcbcd106f663f5776054488523b39667f9b634f78a4119328894229c54ae0d40eb06e58c1b1cf6ed95ac479f7cab0fa446f3754d96bceb822e9aec37c7cb turnkey-espocrm-15.2-stretch-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-espocrm-15.2-stretch-amd64.iso.hash turnkey-espocrm-15.2-stretch-amd64.iso: OK $ sha512sum -c turnkey-espocrm-15.2-stretch-amd64.iso.hash turnkey-espocrm-15.2-stretch-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAlv/ph0ACgkQhcJelaFu uU20pggAuOWISUxDL1N4oq3OQt+yDvicWKVwMgbUrWuwAgsZcvccSaYP2w2eUD51 o1Nr4h/NRc3kPsN93qtyEX8WoFhGGVysmhVL0N2RYSYUvC5edtdS3GetQH6A9Ju8 Dg+Z/bshy6C4aJIyI+jbGdC5QtjZDMSss9L019X7wXX1J4jdgrHcHBQXUXAv9/R7 WWF6a3RK5DAGsvN5gDTI7twWEFPQM+5+FpNbgGwf8hslhYkC4tPfwhFxKWGGyoQt Xi5Dln6RDelTiZlY8vY8a/bxQyxDfJyg/g9JMyGhOcs82yFUuj0PFA0YccYxxauO O4hID3HjCfivz33o+wpv9iErYmjlHA== =uQ0O -----END PGP SIGNATURE-----