-----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-14.2-jessie-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-14.2-jessie-amd64.iso b3dde5459e0a1286cdb526b18840c40929eb069bcf2d1f7e60f5387988f4e7d8 turnkey-mattermost-14.2-jessie-amd64.iso $ sha512sum turnkey-mattermost-14.2-jessie-amd64.iso a9c71dd012f5dbf42f80322b23278ae1a9d3605c398e99ddb8ecc7c815e917f133d07dfb20d192be82281c9fe8979a31d0d2b607d8a4f99b7a7cc0809c1cdbaa turnkey-mattermost-14.2-jessie-amd64.iso Note, you can compare hashes automatically:: $ sha256sum -c turnkey-mattermost-14.2-jessie-amd64.iso.hash turnkey-mattermost-14.2-jessie-amd64.iso: OK $ sha512sum -c turnkey-mattermost-14.2-jessie-amd64.iso.hash turnkey-mattermost-14.2-jessie-amd64.iso: OK -----BEGIN PGP SIGNATURE----- iQEcBAEBCAAGBQJZAJDpAAoJEIXCXpWhbrlNlb4H/3KPU5Q3IaFnWiOap3bNvLyB QGG/pZwbZeTE/pYBfvmD8SUwVINCCHO4xlWgJlpzuWHQBfo0l73CbFehA3R3PjL/ mBvNGNqRXmIIkHJlYVb4fBQMwpBIdrkSaHBZ+34S9XjKDGo0+Q9vyoVu6UEr3iS+ fbjk86CbAazlNm8++SjKqZIhF+TOZMsMnl3s3P2fXBGVXK6adfhIw3lRlWHFVrak 9yuLhs/8D0kHYAm67+9ZC3jT1E30NvLQwzpjDIb0CUyOhnr2qOHopVNF+u9bmp5C IFnhMffiIP2S5HXeiKFSN2+yE0LH1llqt7EJ9YXVL4tsvnU6WkA0ZW7cgsvkgik= =BVPf -----END PGP SIGNATURE-----