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-moinmoin-13.0rc2-wheezy-amd64.iso.sig gpg: Signature made Wed Aug 7 08:15:33 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum aa87afb97f27aab0ab67994c6c6322aa05899654 * md5sum eb0ac89331267c27db6a355f3ce29c7f 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) iQEcBAABAgAGBQJSAgIdAAoJEIXCXpWhbrlNa44H/39FqvDRm1H3GiCrzqMfGpYw SIIp3NShDdN9VSgQbb+KUY5SE5ucDKG+XhuaX0Vp/q8e2YSutaSRieYwb2apME8Z /w1jkMIlwL9Zce/RhRTLqUaAudIh4vCKm13MlW3C/D3bgpo3aCtqDC7i1kv5V3+G zeqhymN3NG6BDFnVNe6pVnf/OF6TJGt9sUTcgW5wo+9yOCMBbPqHO9V19KBIRq2E h8h9ky98I3i48phnkmnrASN77i8QOVq2rB1o4c2oydrLLIniSPP0SgqDD3LSUzIw JdrQ5Lc+SLgisVhhwo2ORdyU5BfQOGHDyPY3fwf7157NeQHr6yEO4RwVgYT1GVk= =AaVk -----END PGP SIGNATURE-----