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-phreedom-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 12:13:45 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum a6941472a4692291295d2c757795fdecbfd525fe * md5sum ecd79d28a4839a25636fe92d1bfd1283 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) iQEcBAABAgAGBQJQM3tuAAoJEIXCXpWhbrlNuk0H/iskRr6hJDXQvZemVx6UiR3d HBd3RchpiL/0NRvekezxd0GNAyo37Y+VeIomUwGayBmwzWgeQ80bMwtFbuX8TiSU t56B0ncPm3FqzpFmbbXhwqeAzNkPmax/Y9Lfb/kzPbbX76P44V8+AsQMeLByBPcE EEAn3po533AWg4sEi69L0+wY7dROCCevWak6zuvtXX8ceUz+a2ShGoPubyJZFQLF 5F1pCDmUiCBIMavkespBBAv9DR6SYvCvHCRKZJPF31S9PIgKjdrKwXuRpFooOIDP kD/4oOScdrbC2zxPrCJFwk65sT/Leefvo/8KPJ24EC+7HNDZOn9GE1Y0XY/hZKw= =NsW0 -----END PGP SIGNATURE-----