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-postgresql-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 12:13:57 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 4f3a4d725fc07b2bc8e874ef5a1a5033436930da * md5sum cc7415ce7c7ca7d0f02d182dab02ba9f 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJQM3t6AAoJEIXCXpWhbrlNBvQH/jfY7ZoP1Xp7ExFJTTEK8ElM zbY0leTKl7PmQbGVTYEGEb0mnIhfS2lRDWoF0SP3u3STFWupN2mepXavPB6JWBo/ WE4WGzPNpiVJkej5BEH5YtaRujv4CxraIdVW6Ech8YkIFYcLCe83LehexJKViOge 4obS+G74AAOF4OTbnWvSPACjSJfvwjv/OGTWe6ZgdMHZUMLcPRx1mQoV0X/GRkK/ 0TY9iDs70h/Qdwl020TvNA7x6i3DiiqVy/Plu6A6uW7fxrSOAWeZQwRGsjb2fun/ iXaB7VMLCGUL0vlYFEaGmmqtY9N5vY6qQEIIrux3ykjba0nWPaRpv/U63SdrQLI= =bspG -----END PGP SIGNATURE-----