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-appflower-12.1-squeeze-amd64-ovf.zip.sig gpg: Signature made Tue Jun 4 12:23:27 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 997775c36d97f76c0f1820ea5e07e31e49c7e553 * md5sum 6b781c3e3a11e613323cb98773cdf071 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) iQEcBAABAgAGBQJRrdw2AAoJEIXCXpWhbrlN7FIH/1dzDuz0dZPoO3GKH5yTEYZX sQUV4lcUZ/TYgkrRUovv41YjqWZd+ObeQTeFtmPt86bEy1FzbfUIBM5hN3U4nxom r2rBUe4QZ05MKeNRV1GMmPoUCOt4/J0vmlJswObeQmky7kVayFdqwsKEU8w+H2kI ERSF/lNgFdZjJFdV44ZbRIEhh+/j/ch3Ig8nkgf+YQX1Z1UKH9iv6clrjWe1T698 jy1x6MT7bBUlBOc9Gn6ySsDNGIeKx4ls4pDn2Ny172mfnHMIxA8LS91ZvZFfg5sO /9bFQEKDtYhMhCJ3S5Wo2F9uLgh5ltXphHKX1Psr3U2EqVNzZIW8IlOqqJ+BS6E= =h02/ -----END PGP SIGNATURE-----