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-tkldev-13.0rc3-wheezy-amd64.iso.sig gpg: Signature made Fri Sep 13 09:24:15 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 4e8343868e9756fdbaa48d75d6f035cd5b56431a * md5sum f064a63783db62ed9c433013f4414a71 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) iQEcBAABAgAGBQJSMtm4AAoJEIXCXpWhbrlN0ncIAJGuXHM3hOH5inkOsvvPMoNU wcj5VWXmbiDerPjEocgNaOZiOd+hWgq02EmyxB4peW8iq0thdDRbShr1+BtnmJPj FCtwV/GmqqbzSaFB3SwrWQksoNxXNqJwvegbeoiEDaRmrVzhz1O6C2rmu3BHcWZb mm3PSrzouFsGe+yBQbvwCBvKOf5DqQ6HaUgXeC8JYahJv2n1p9TqmVuyGVRM4NBL x9uE433lQQsg0pTc9sHyqBesSoBJGoJ7AYZmHBj7JHCZE4gXx+3M3/vYXrrnbn4A iQroSJGi4o8PpZAcFK5JbHD8nceKOrXu4+GEsdGZwZMA4p2THpGyKZoYiquNGIA= =wsYT -----END PGP SIGNATURE-----