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-rails-12.0-squeeze-x86-ovf.zip.sig gpg: Signature made Tue Aug 21 12:22:46 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 50a64d26c3ff7f6c2184298b43520726e5a45319 * md5sum 46750a4648f0a3a4d2858cc0c38051ce 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) iQEcBAABAgAGBQJQM32GAAoJEIXCXpWhbrlNKEcIAL/2aS/LtdUPwLwqpARHtcoR IpRADtH17ip0XjN9hABJJs7AjPH7hkUi2yMAWYlkU/AVEY4mAiR9tS1Lb5Ds8OrO Uqbk5TZbGIoqnf15vk5R0iZ5fMSkKE2HQiHc4Kn9TBkP9FGPfYBRhOSrDIkhRHTL LCodXa1RT+T5qVc2zoWMzIP6FSKeeSqCgesatmNfPEvmJNC5CXRgGnO/F+YeUIST hcS6g35DAoLDe6rRLxHEb/1S5p7em12HLf4VBHpJu+0itmIymK5RVKQGIEfpFiA0 Syi6pmNcNipEyhwqxyOfg2T9+w0gGZTXB3uMXvrPIAh5Ipw0CZPpV+CEfot0Rq8= =IsM3 -----END PGP SIGNATURE-----