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-domain-controller-12.0-squeeze-x86-openstack.tar.gz.sig gpg: Signature made Tue Aug 21 15:43:53 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum db6d635acc80ec4b7241fb42269d344c9b39d97f * md5sum 81cde1b3dc80f4bce83faa2e419f4ae2 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) iQEcBAABAgAGBQJQM6yuAAoJEIXCXpWhbrlNh7sH/1tz85+Blmnq623saQSBSoLR oAeeLQt5IFkeKA1C8kLgJPlW/IU90KTNGyG/cU4I3efQkJBpVAsuRfJ5MbdMpwRo YyfMMliCp0L/qI24/E3LV9RSx4gAm5QuVMI2knEsKBNf8VZ2InXDFoyVMqU8m4OJ Dj7JocWAw4DGNsnAZmdpwCF9zYGOu35QqhOE/z1GNhz71MsMSjw28NRnGtbwcHB0 3ah+8aKatpH57YelFmMh0LphqTDTSryoTbmTZXvo9a+8d+9+FUXsUEcrWw5BQ92d yumESDTbRTf9w//F5XRyayDS7Mf9fEaV8gvnPMhnFtumO4S26bqs8TktpB0pSgw= =QOMO -----END PGP SIGNATURE-----