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-processmaker-12.0-squeeze-x86-ovf.zip.sig gpg: Signature made Tue Aug 21 12:19:37 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum c02ff21dc04c284b407e4ee7109354b5c2bf1d13 * md5sum bb0c7aa7d28e54f5f9163cd355217470 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) iQEcBAABAgAGBQJQM3zLAAoJEIXCXpWhbrlNVoIH/37/CymrPSoBrBOrfZKmyQC0 NeYpxcd3VdkUrmaoZYYRxtFpouiwlfq04u6uaNydRRnDSVwt6GtK48S9hGdMCkih ZHfm0JCyKjKg3Bb7daPhOYbLt9+OUrk8gGoU9wExX7Vdq3R1/8FjrL7puppLx8Tu uxKRBFvhdGSLfT27M0oSbTVKwjdEtY4FhJbU6nrjjtkDzlMcQrrQxMsvYAH+YhDh ohCmZXH+rVRip/VJWyt/4Asgm15AeXpa4QfqBfyXHESn4qaEVCLSMRRQrPz4p7oq LZ+UediFT0seL2zbUoKFgGpir/agawDKgV5/u/zo7w88FzvabcXsTZK7gVxURwA= =NGlM -----END PGP SIGNATURE-----