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-b2evolution-12.1-squeeze-i386-openstack.tar.gz.sig gpg: Signature made Tue Jun 4 20:01:49 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum b068b47db8a62b60befb91e9dcafdcd6f1afd224 * md5sum 0fc6589d1b80f5b0079901ba10aa9bfc 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) iQEcBAABAgAGBQJRrkegAAoJEIXCXpWhbrlNlEgIAJDr+uIlXhf6xW29DNfCdZv1 0hQ9h5OZxHKxLzPDUjhB3oiJgHzsJoJH0LCOp/1LJv94tPQWku9w34EdTfy9ZV+9 3AdOuNOHbj9GyNuZciRkXTfFcfmrYJzlFPpibvWrU3CkIhYyPo/H0YQwMuX/MQ3m cA/qgSIFeXHVbp5JyybfRkzDdAi+CfSZ1Tj2HLoEdXgP0WVcG2XWfGSBeqq+xX78 nYW68GDbW30meoYSAScO33YO2mj0iYmgxPiUTJpCiHDUpvQ5QPfRmu2tyZxhM3YU EkKYwbT+n4did27Cqw/dCWHy1J6xM4uTpjUJSGW3U47UclroA92PQOlybHuk1Fk= =6H+9 -----END PGP SIGNATURE-----