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-codeigniter-13.0-wheezy-i386-vmdk.zip.sig gpg: Signature made Tue Oct 15 15:16:40 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum d2a502ce33ae33f5a8b663a56562c2e2f18df141 * md5sum c7548d556848e370b8b0184ef0f709f2 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 v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSXVxPAAoJEIXCXpWhbrlN/u8IAMdksJM/Oti1B0g1hlVXmCW6 FkircHljB4ye5wUJ78xX8WyUvptfdcCwrGTMRB4rQBBlJcDi9gTF8LLp0FQyYBCc X7voUHN2p/IKcky7dLQzd7NJjmL/rBef5UtrLhXupaSSK1io6eEiUwbOq9eZZTkC O8BJzfK5DEW1zB6jpf62KcTA/gRDLTKG4thlRPyHXq4y0cg4dkVhUF8YbLg3+dTI cqZjoyE2GYtwhdJVhw1jdjBtr2mk0/9KtUPiS9Ks2Yqjl/Om2IB16NKN/BsO8Bpi leVc1Ur/sGpqUKe+WJ1RsHk29EGnNdNiVQzpAeaMdjdt7fe8Shw5Fp65HXlfYKs= =WFmJ -----END PGP SIGNATURE-----