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-sugarcrm-13.0-wheezy-amd64-xen.tar.bz2.sig gpg: Signature made Fri Nov 1 09:37:56 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 6c594530f391e740f6ae243696cc78ca6a877f4d * md5sum aa09da55560fcf85db583db961939a1e 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) iQEcBAABAgAGBQJSc3ZuAAoJEIXCXpWhbrlNxkoH/jm/PQkYkv8n0hA9BHLppktE BZwhMNhFWJGKWJLJvq0Udpr88DJT/wR9UsQPmwlquG9JYkOWAt3Rmy+k0WtpKuW0 r/TW/skKJZNhSkmejUBz8ymWyslT9F/Y3AEuofIwi6mv1jiyb+WwGNK6BCzcrTPQ Ucg21BmWp76bJBvYpUyBLXz2ay3eqemg3oNzcLAA4Cx7Sd5XhlnEP2DyHYhcB+5v dJoJI85EwAm6e+IJPiCbZlCnVpdFjh0rOGDsYrYA7u12oya5Q8lvb+a2/1rDCBr8 MgKWES/B6wv91wJKOVvYhcH/iNp/SXHKJAmdB1IM/Rfk1MherAvJA4O4z/An2Cs= =DwNM -----END PGP SIGNATURE-----