This signature file may be used to cryptographically verify file integrity, like this:: $ gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 0xA16EB94D $ gpg --list-keys 0xA16EB94D pub 2048R/A16EB94D 2008-08-15 [expires: 2023-08-12] uid Turnkey Linux Release Key $ gpg --verify turnkey-bambooinvoice-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 14:48:11 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 2c7ad4c19779bfab949e21d3aebf4bcec963d70b * md5sum 5de30573f5226088b0927e54b30fd678 You can calculate these on your end and compare to check for errors, but cryptographic verification is recommended for security reasons. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSXVWiAAoJEIXCXpWhbrlNJPAIANvo4+2fdyfPWAQqXWf7Givd icIzc7MkvCCEiPc14qm7A+u+Zs7EKNCwHdyIZ3DkL7SX93eN9XnjRUQSZM28aj9G JlqlyX6GkWHZm9YLo2D8cKMQKdJr1dOJ8E47Zk/ozbbRYyx//lLFpHDHmh/9Rbnx ygb3digm8q3soVwu5KyecZCRhyNnmSwtHE0I2itUI8HEWkmWdeHfVj9Yvyi4+S+P rOBY85Fyn8Kk/r9MGlt0lKE+s6OIoDimCCOCpITX6E5W6naKOZRk7VyiuGQRg0p2 oG9nLAOfZf1ymRsh3fgF1gj/4y3iGXrRNstZA743AcuCtgRAX3EIF8GJA+K9EmY= =Z6ln -----END PGP SIGNATURE-----