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-icescrum_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 08:59:39 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 80427ef28fa8423309813c19f37af4732466a894 * md5sum 9e2a95a44a224145aaa50824bd6c04a5 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) iQEcBAABAgAGBQJSXlVtAAoJEIXCXpWhbrlNh80IAJD44gCGQmvXsxQ4geQi5ir1 qArUbkY9du55OOyG1hiKNZ7+u8twmQNWME102IM6vlT7YsSNiBzGP9NbftpeZNxa eQrtDpOs8e01LZ/zNjWZtxjj4iGKImgFi6SHSKkca+NUDN2/P+/MpbmSVzqXnPlR xDDf/dx/KjpKmotYuvqajjRbJXIl3PjgS5RcZIZ50zsecPVxWaU29Q15Y/PEZjf5 +fN19mBNCaNb2ZJdrnNG8hw3Cnes+pvs6zEYSSWn2sBwm5/dPMR5iL+tXo4xaC0X hm746xILslZZP58J6oxrbFhhwzIljjEro3xiqFN8VOZ/87peOeUb9GLAT80x9Cw= =8jiH -----END PGP SIGNATURE-----