-----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-mattermost-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-mattermost-15.1-stretch-amd64.iso b6b37aa1dfd7c59ee8ccbf1094f53caa1561f67f90d4851a7e6974ae1a32d38f turnkey-mattermost-15.1-stretch-amd64.iso $ sha512sum turnkey-mattermost-15.1-stretch-amd64.iso 0704cef2ecad1d661d556ed5b286ca6df88faaa9122c6432b2067699a53ba47901ba6c5afa212c0030d56349bc1fc7bcbb793cb3be09ae1ee40b9ec6571a01ff turnkey-mattermost-15.1-stretch-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-mattermost-15.1-stretch-amd64.iso.hash turnkey-mattermost-15.1-stretch-amd64.iso: OK $ sha512sum -c turnkey-mattermost-15.1-stretch-amd64.iso.hash turnkey-mattermost-15.1-stretch-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEaUz/JnlaKbrge061hcJelaFuuU0FAlvITPYACgkQhcJelaFu uU2JLQf9FM/w7HKHWBrP9kmmgTpLdrxCzShJQxgBgVv1gPHhwx63KWBcl+IXSFny HchHiXSdozMk6sQnJiIUb7RLQHXVZqLgkE7jIAHy37WBFMEnkSefolfYwgdKcW2Q TWMSTAqKx+l2/a9TZoRTGPnfE7FXCdbpeSV60/OjT0BzwkuzLvPrdxBZ2tfIPiAI F91TtozkNicXSkRGPBdCr+Qzl+aK4DUUBEw2c860br+2qWGq845le5F91p+ZBMMd DyY5+ukK0BquxnxXkiB9OGGOgl3pHG50NTG2K95O5pHW8gAPJ6s1xhLKKRznBPR4 Y3gLaOHMcA4ybOwPvTCIcVWssT3QRQ== =DgME -----END PGP SIGNATURE-----