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-twiki-13.0-wheezy-amd64.iso.sig gpg: Signature made Tue Oct 15 16:55:50 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 8a0e97e1170ea3f26d6f9659e0e576b65f3c288b * md5sum 0692a8c6f270f112ad35a5280ffe6e85 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) iQEcBAABAgAGBQJSXXOPAAoJEIXCXpWhbrlNzakH/j5J/IIlBaV2nrylxUJmBbCS +6GMxp60lSF8GAik6ElHSWSVtO6FNSv1E2UCrGlVwHLGzvBo1i9VNIl6SDB03qqr vQkVVoL00378b4nfjhh816qAssBNvietgTKPE0EZdbes+oZxr7uiwrhM49+GFn/v S9chctoc0N5J6vWF1LzMGVjOjK6t5UUGChC4yFbYQYQWKd60fkuDVcgjTKRM5tL5 Qa0mThCw5yllj/tNP8J9ZRd17HQSOyu8/AIrLPPZF02XpieZM7EeAb3u+vMK3AtP 7ny333vgQxrycU4b1Q6LzaqLq0Y6EUlCAbDBhyYmCBz2GHEeFtvVzJQboBR/Rnc= =SCR1 -----END PGP SIGNATURE-----