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-mambo-13.0-wheezy-amd64-openstack.tar.gz.sig gpg: Signature made Wed Oct 16 09:08:17 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 1f059b3c556d899e91143f366d52239c649134f6 * md5sum 54c80f2ca2a926a2a4abb6a67160250c 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) iQEcBAABAgAGBQJSXld4AAoJEIXCXpWhbrlNclkIAMp/V6O/R1a+Gxu5d5Z1Ppc8 rmOrogORVKzry5V9aU3vjHLJ4sHJIwXNVs2rjbBriQ/fiyXhVh6e2tcLOWV5gkX+ XqH8YQWP7JBZNHaTK4+ewpss8ui1r9OXdjkrQdGE27nmnSoxUjZQ7T7JksHRqodn MJukAtcyS3SV2bmev7FuwdKlaFzPdcmiD7zNphPVvHFoYJXzDdig19UUdEerVamn qRGCSUovTm1YNi3pvWm9u2gnF9qY9rLoLgIGlgVJ4o4lHqyJR6aSxpIXAf+ii4Bv UBkPsl5sBaG2JGrA+pibMn3FdvyArXIjgCjxluNmPlqi5GYhHGCvheXktO9JEfQ= =A7Qf -----END PGP SIGNATURE-----