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-e107-13.0-wheezy-amd64-openstack.tar.gz.sig gpg: Signature made Wed Oct 16 08:25:31 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 76e75c24781545c16c08c1db3a1938840a03870d * md5sum 4d6e3652e75a375e3e772b20ded944e8 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) iQEcBAABAgAGBQJSXk1zAAoJEIXCXpWhbrlNinAIALeEyek62bgU9TnN/dCK9KIv tiHC9SQgPCr+xDEjPf+e686r5IfxuLpo1KnOmx3XFvwYMAR8/QU/mTREj8t3c1Ug /M34Ez9xL7bfSWB/enA2U8gwfcNw3R7IL3WSFsJekeomCKUzWiVXFUrwqiXLlMu6 rpFkYP1iO/qmB/GjdAgbVA55HiHqj1E+YyGOXT1/hyMS2t48TUJ2MazdsrC8N5DX A/4r8iP7IYAKgXr5VxJAjLNGEMU4zOcorTB/E8Yze0BxTFfz+REHR07aCrWwm0S4 OLrT4xr7yXK7uRJxbg3ZeBf54rBc/jwlmUc5rJ/IWlHjxMerDgfmE3er6MBzqNA= =WXQw -----END PGP SIGNATURE-----