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-jenkins-13.0rc2-wheezy-amd64.iso.sig gpg: Signature made Wed Aug 7 08:02:56 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum f354bcba48049fe573826b68563b245df9b77dda * md5sum 28609b6253dd0b182dcf9446196cfadb 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) iQEcBAABAgAGBQJSAf8gAAoJEIXCXpWhbrlNjDEH/AxO35LUbFO/S4VF50hjkaVx 7zRGYyZaU87o0q55Ms2OraaKuqqKNQrCFTRH9VGpkHOiBj5GOFDUxkbGCvOnMM51 MwxG+d3Kym1Al86sFwN1Js5w+n3+D//52chE4fVf32NFtORBkuB8d9PH9ki14nzv iiqSt/B+6xNROCEB5lJTVxMjeZ68GZt0eJdIqi3c+dNKhSNt0DoQk+Gll5pgUI66 7LA4mkFcUZRRyLRpD2F1LbuymE+thnYKZXsm39TeyMIZIS1kxyW1cHD7yzddh8nN bmrgF557GAVTBhNYhe3E0IpBkiwdRhrH2Nh+jShTLkgAeJ0nsLs/hsov+NAfLlw= =tfz2 -----END PGP SIGNATURE-----