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-i386-xen.tar.bz2.sig gpg: Signature made Fri Nov 1 09:47:55 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 584d8079d19f56b8cd9b65c4f3b601e5c0c123bd * md5sum 3a7b9a0b2876abb53f1ebbdb3db72954 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) iQEcBAABAgAGBQJSc3jCAAoJEIXCXpWhbrlNRr0H/15F27emoUYzRABNUpY2JQjN lOF7x8A7nqZxzyuOSRVYjmia6KpTdwkuIeUQBcGwJ3xN8ekTliCmq4oHLSMIKT+A WLADWkvPMJ7GKLffbctDhqOY+t3Houm2sS4cLS+1wmjItx7flF702qWMnLzwtAyj s2yTGZ42z6v8k3/j73TVz3OxfjEv90M8qsfbnnZDggqUnsmVMXWwTqERV+OuGL1V G8l3ANGQSZNpTHCxlD8zsJ8+mCSOOqm1mAhBtygEmg14uH706DAA5Nue1pmNnQEI lTSDz9j+fuRVLFn6capFCwt7DCfcGmgZaR2JEmJHZiEdjycGHCeCCGePQOyoO5g= =TCDX -----END PGP SIGNATURE-----