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-bambooinvoice-13.0-wheezy-i386.iso.sig gpg: Signature made Mon Oct 14 17:11:39 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 1109c06e3b51f6d97673691c0d8962f1ce31174f * md5sum 435743b55bbc464fbc41391447bbe988 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) iQEcBAABAgAGBQJSXCXCAAoJEIXCXpWhbrlNNxMIAMZYNr4DaYoKbuaOJ3wXjrfN skksD0zo1GCaDkgw1IZu45IgCk/9kKGR2V5uxJ3aXsLrmB2ROwKQet3+KpOawXcj 0JSDjkkGfQFKedVy2juO8qZ85430LIDolhHbOy69TrPe3i29CUb6mjS1HZXmfJRQ 383kaGFPnTopK/4S3Xx9DR5Fa9/L5wvp01TqgdwYor/BFdU3GS3fbayUAcTsFUX9 B7mSh1hrpJMzeM25QD1jMo6wLUfPVVUhj93YqHB698E8e1mpNZIyGOgqnPWLO2Nm N1cIkWCUFGmM+jPjAtHd5Z79323TBsrIFWGgizuxZEMXERwQIWcoEHt0RIDSXB4= =lYMf -----END PGP SIGNATURE-----