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-roundup-13.0-wheezy-amd64-ovf.zip.sig gpg: Signature made Wed Oct 16 10:02:51 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 800439f79af572e406fb3c629d7d58c1baf1ffb3 * md5sum 28e6867fe924b80548639b5e65767d54 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) iQEcBAABAgAGBQJSXmRCAAoJEIXCXpWhbrlNedMIAO0TzGDshDFm6uzvmnqeTlh6 MSTH65EoECiyWod6gvjTIwVYg45uFIrRlPUrC5G/ptnsvZFQqcRxz19UxYIjOaGE GXAz9EuoeFR3Trvgv81ZvvxHFbrlVmO213/uP0NWXt+b3xCcCKhyvCe5mlcYigCr dHaxb1PhMJF66FyrHVJn/k9hM96kzI3bXkhEBaTXvH3tNhZdJDLzcG7ICR2RKbTD WJgmxPRwRasjsR9eEXuH0PooHqOw0J3LjVAjxsFnKP53MLlO+xOhP8lYKhjLMMbV CMlA+mrGHQqmmFj9hBQP2cX7ghOArFAST7xOQU+fdtDeEUAWWKr1FoQSY0i8ujw= =3+kP -----END PGP SIGNATURE-----