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-punbb-13.0-wheezy-amd64-openstack.tar.gz.sig gpg: Signature made Wed Oct 16 10:09:20 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum a79922abee9fc2d5a7da8c03b8a8c12d7c03abbe * md5sum fb546e72376f100e7610c185a6a809c1 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) iQEcBAABAgAGBQJSXmXHAAoJEIXCXpWhbrlNnH8H+wZlV2fEvVapeRSUu6fAaH/f R9qJEi5idKWwkknrp5Vfupqqskduw4Jp5I7QPX2aMOhhcsQwfqzZd3PuNdS4Fmli wlju7UryZ7RkM8B3D6Hq0pbXcuupX1FkAfrAMyEDpYgER1BbmOU0eDFmv57uO5dt A9QeN06oHN034zJZkcULWqpDge07OC+osGS6pr+BQdJQ7arwd25vFM9TvYFUfbvy i/BpRTwmsVy69cGDyLDHuGN/osfEbNM49o5ijCmOj4olAJn3OBwL7VUEiqyUS9S+ cuEX3qKJl9C/B4VUkSG135WTsKvbC4gvg4ErARYzNjAbaRJqGVCWT6fIUCBAiFc= =TgtM -----END PGP SIGNATURE-----