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-cakephp-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 11:27:29 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum e7d1a7a9d4029fb6a62e3152c477d39c6bd4df23 * md5sum 2e760159cc6997987537b37e8e504970 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) iQEcBAABAgAGBQJQM3CWAAoJEIXCXpWhbrlNMvMIAMQm6Rno3R3aPUR+gaSwLO+8 jPz5/qf1JZcGkG3HhKyobOExfUcyl7k2/ZZjpmX1n2ceSLffEHH2ULXMkWwwshFm T7zpSE0V7C7QQzmRPAX85HiSug6YvqS8exc3zvDi3juIEvnl7QoEWVn2eVBXOL9z rfLGFKacYv1kYwdGANA0YaPtShIPPq81MRDxpo0iGyb2oCAEMMglNNJQJ2Xbdq/o A/INaIv/VPBq44gPyEaGZldN4l5uqL/45rA6kWfJ4igtgf8pOTPOZ4phDaZuqLcJ MGo2ESu8yqH9I1TvO/+G1fWEdw0glliGac9Jpk79xPRmdBbbatLWTwSTidwxDlk= =o5RH -----END PGP SIGNATURE-----