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-plone-12.0-squeeze-x86-xen.tar.bz2.sig gpg: Signature made Tue Aug 21 16:34:58 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 1fcf9a7d8e432551b2f2ff76af1000ea97924af1 * md5sum eb244ff169c6a7cad40706a76745fb8f 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJQM7inAAoJEIXCXpWhbrlNwDsH/i02ov2S6k5+rdRl/SaPHE9s V6ZPpnroNZrsQ5A8dVVCpEP8S/xclcvIG/ne/35lGrutg61eBne10oMEOxKh/b55 U+0a0dxUaj7sUbqvRJn6vNqjt+83mpFIAxD3k32NiyaSPxmrEEUWlfKsIgGWK+3/ bRZpoOzURDOfc8cu70S3TvFNcZydB1+Yf87DFcOxmfDf71VuycF6kZFSdnGZ3sIw ttKEe2bKzT3UMdQhDWZ2Xt7aCUfr9PM1qIeXydLBk3WP310oXFUwz80HMnDpPCYw IztfCA/2p/5R9JhWWI8i0WDnMesADZ7VfTofmiRJAVmdE0xBnbPNJMfZ7lHy1qk= =DIft -----END PGP SIGNATURE-----