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-zurmo-13.0-wheezy-i386-ovf.zip.sig gpg: Signature made Tue Oct 15 20:28:43 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 8a8f04f0ba4136432dfba53b63d2b36df5cfee23 * md5sum db978ad332dbcb81edf618fb9881c1aa 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) iQEcBAABAgAGBQJSXaVvAAoJEIXCXpWhbrlNRwoIAOcPfV22Ft2K70z3moW7e8kR C/WagWz5R3ad7L+Gtcuqa4hutXmNlhEr3YiZgX+fkD3vYoQN9XavnkAKV/rHDFNk yVUHbFXhga2GKy+wWXmhFrouVOgW2NiqpWJkPsZEQx3ZXF6miQpgQYv0I/ag+ELU vDIOVW2FbLMyRHDPT8AF8EXK0EdWfSOY6LvI/AWNKZTG6RX82yU/aZ48ahV2ae2p wnyFDbvvoTQdtZeXE4+lJjwqu1GEQg1IKPNBLssPrkwEAkwY6LfxcAlwvxm+UEVK Vm8HMCgJ3FIT9hQWP0HEzvRsDKPiMCyTB9dt9H6kVgevjfjdmeW6e2/0mwXLc6c= =3pWm -----END PGP SIGNATURE-----