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-collabtive-12.0-squeeze-x86-openstack.tar.gz.sig gpg: Signature made Tue Aug 21 15:21:21 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum d067a92b67376af0ccacac4ec10795499e2ca728 * md5sum 52367bb4f72b95995396fda3d96996d8 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) iQEcBAABAgAGBQJQM6dmAAoJEIXCXpWhbrlNTLMH+wcTsUUNOYCr90aVCVBH29wi Gqm1280wzxfG+8N1fRcKuhV4e0dYZecAEirNocVHW0x65/z1O5ayUn4Pz0lpb0Rd KEMBLRLFKssYUWoC3GGftkDA6r0PTyGOPIeZJOEb6WIzsHO6XNvsObPVFaT2QgTj 8mfNKOyUU7A2QtgF02he9t3wve4iEzHwb6q8uKmedc8wYFKmQLUoHw3i4Pq7WPNT I7GjfrQw2eMSdUt5f0K6W8kNzuTHhRY81RU+epiNh/9XD9VkhP3LMh0IpbickYH2 cwi3owU1TpW/BlPH4gqKn+C7BPSYONsJDkRMXEls4RYDvDgoR7Vc2fWiFRsFatc= =Din4 -----END PGP SIGNATURE-----