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-concrete5-12.1-squeeze-amd64-xen.tar.bz2.sig gpg: Signature made Tue Jun 4 13:01:50 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum fc63d79f9e6aaa1fbc1a82e478d779c0287289b7 * md5sum 8ea07fbe790d65d12726a8abab51b3c9 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) iQEcBAABAgAGBQJRreU3AAoJEIXCXpWhbrlN7goIAJZkdtT9t6uJSniLEfCwlwsi g4HpLxofX/6WAlJlz2ZToE2tiLWNy+2BXGpmu0KEthvKWRS74PP9dBX0HjVKzI6y XqtlH0BUYsL8Yzb/0xIVubuD3ZOtERG/914ABYIrcgHX71eA3Y2h6qjPkiDJr3YP kt/Sn1URutytoMfqhgC8YY2zYuIJEwH58++yAkmf7cr0xs+w+1SF6Q0bogNm6fZI 2WdZQ7mL6Jb7U1OYIFd2KgM4txtpJwfwoR/YmIIlumc5WZrWBwcffwmWNlHPcoXj U5oGhrNrpRgqrzKH2XAbZXCzFB6hiVFwbsMsCKXE7uEY6FBJGYAbhidHxTcdHJ8= =JyRR -----END PGP SIGNATURE-----