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-tomcat_13.0-1_amd64.ova.sig gpg: Signature made Wed Oct 16 10:33:46 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum e4a1435781b9bdbdc5b1013e90bcd7b54387e36f * md5sum 858c0aacf9e551f5ec9f6d624fba31cf 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) iQEcBAABAgAGBQJSXmuCAAoJEIXCXpWhbrlN0TcH/23KkIeRx2v2UejGz8Rh69OA LuE+QmzijfUPzcNYvzVmmUNjrGbH5JvY65UyUV+QN/HvOJ/hKCsdFeWGVPttoJOF SCERC/KBheSegJllYBnYxXqi13lHB1SVwYoatDTruSQS4YOLA7yejW1nn0AYgf5z sOwdz8i20QOikGulDOqJjOfH94eFWw1M86JjLEhANZ2F+kVLew3RV8+0QBgvaWBZ q711XozNNImCvrpHSRMSA2Ne8bH62q+BaxiRidSLdXG18QkHyslVGe5hNiKQKak2 Sm3BRk3z6JWAl2/yueaLVuGg+anGQT+VeB2Wn4LhlQyuwIE4eejrn9fAvFBoqR0= =ujEU -----END PGP SIGNATURE-----