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-vtiger-12.0-squeeze-x86-ovf.zip.sig gpg: Signature made Tue Aug 21 12:40:44 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum febce17797b88ab42079b1ab402c8c53135bec14 * md5sum 966424258b717650f4b3c85bf5b278c5 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) iQEcBAABAgAGBQJQM4G+AAoJEIXCXpWhbrlNVhsIAMZ+r9iinuh2poWChSiSeCT0 8OxnLcdp1I5ZG0xT5lQmTypyn8C5J4m8fp/OzQSdUTGu3tAJZ41bmGE8pmBSUtBp A835XJj2im85THKecJumpg3luLoQ9O8hXPfGzXhG63OPQDJO4Q33QFf/Azev16bI OgRjpvXHr2mmzrGkTFRJir2DtN5qyxjaFoXbiIIB7bROOTFeVSEG/K2d+nlI3t/U 5tgqrJLTDBgqPpRqHqKbGQohrJ9vFkKoaurTKJrX8OOAAQlBbp5bPRznAlxAKpJ7 FjbbI+IGoRd7tBLLXcuhZYEBravIhz51Z5ny+BqIbMB42lr95LbNANPWtF7fUB8= =G0n6 -----END PGP SIGNATURE-----