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 debian-7-turnkey-codeigniter_13.0-1_i386.ova.sig gpg: Signature made Tue Oct 15 15:21:01 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum d2840eacdfb033487e99b763541daae3ade999fe * md5sum 392d1041805eb89489a608e72a0360d7 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) iQEcBAABAgAGBQJSXV1XAAoJEIXCXpWhbrlNuzQIALUBGg+X/v/4F9WVYvbXmKR0 KPelWcOCf4DSZTx/xF7+4xo6CJTuE57Ck2+iAXBbS5RGROk6sKMyAl093kH6mSid ViIWDo/4mPERdRfQoU4uONuup8D956SrPdABL0I09oNUWw4eDS2Ox6x/jAlHXUvI RA0DirfCRkfXrkIpRoNYQu0kbXLBjHoEBYShv0imcUiIPd5TVMGLv5i0FflquxzJ /2isuybKeWIhwCWeFXTXFLxkRic4lJQ8lthmcoAMxriDRBic33HFvqJ4Qk1fotBo sPWol4ec8gtIOIZTOBwVTUehMXpht52qH0wvTtItMQRQol3Zsr7lmNhhsceif0Y= =eKtr -----END PGP SIGNATURE-----