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-openphoto-12.1-squeeze-i386-ovf.zip.sig gpg: Signature made Tue Jun 4 22:34:32 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 9865f9b83ab634cef69ea4f65a575f3b6aa3f384 * md5sum de7d7ac2492d6af79933e031281f2cb3 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) iQEcBAABAgAGBQJRrmtmAAoJEIXCXpWhbrlNS4oIAOYJ/7q6t55Q+sjThjJUrInL URVOwQkPsi6GF006hNs7PEZOiDmw6Sigz+VxQhexkltD+uGe7WNeBN5OMjwBgoXc Nk4HCJfU5JZXnVFFOkjiG8FaNgA4ujriM1oQMzfap4YbZw44DMktC0Kjl3I7e4iM Z6QMvvcrtlY33JoiV+XORpo6BYGMHjts6t9E55bQQ0Ur+drEkqAAnMmo93IFs3rz EDbpq6V3VXuA10hSLo6ZrwUjZA+3bzTVe33HRiVjpE/c4q+f8U/TebxR7HrEG5S8 A1U+e1MSMw9qi6MgLmh0di2kfoVjaXbK++X0AqiV7EwaJlYjw5k/arFDgiyRn3Y= =jm0+ -----END PGP SIGNATURE-----