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-openphoto-13.0rc2-wheezy-amd64.iso.sig gpg: Signature made Wed Aug 7 08:26:41 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 9716b9b482cd8d0acdee5b5f8536e80c780027bb * md5sum fd2cdb5f96db1dc490e270e333da4044 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) iQEcBAABAgAGBQJSAgS2AAoJEIXCXpWhbrlNJN0IAKEp/r9x68adagi4hesHMCFc KS2D1kaTKWG3rhhKypu0ZmZ7hWM9KZeVmIS0kblqNZIkyrLUT7I4PIIJB1hMXfW3 avQoG0Xw1M1n086nqXayDP080Fy1lGbjeO186U6h7mH1O8vy+WGO4cYUuoDajlhA 0bM2qYSc26cclG70GQzoYAcohpAdbSvifG0dKUWHFIpKaxZtGubHA34sO4nNgLZz bJ6xN8cbtQLmcdcQtr+fCf+xkNDYIWWgFhA5cFBOdCa0P+xOfVxsLWXoDsu61Xgj HoFPJjcBcH4qYmAujAQS6TjOpusGA9J/HEijsgFo0IyWvCqgvrVlCHfzpgjcXsU= =ttX2 -----END PGP SIGNATURE-----