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-collabtive-12.1-squeeze-amd64-ovf.zip.sig gpg: Signature made Tue Jun 4 12:48:14 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 06f332621a587d05c363583739c42c583555d911 * md5sum b62b4742932da86ce9c590c48ee37a48 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) iQEcBAABAgAGBQJRreIDAAoJEIXCXpWhbrlNHUUH/ROUOEkfqO1hhgKy7XG92uFb zjfUhVenBwuOliSevtzRg2/3L1S1QoAW1lflbTcWk7yjBm6lFGNwsTY/PBC/ISFi 6OAoy3sYZM+45qzSG0ZLzur1fejsYcVVdVj/2DcLH/zQVu3KFGGzHIagzCznYUqt QweH/cKXO1szobPeNji57W8+BTxIZP7/VV7pNOASM3FCy6paNBHLtofb03qX40D2 3B9MuZaHe/CdCTGFWVhBycKNVsQh8oqE7X2zhghrPHnffKvYkrO1woD5QP8gCnBv G1RTypOyApQnN/hten7bTHrK+su497Ixb+Xer3kstwJuoo0QPK9vKnqRdWs4IEQ= =V9vp -----END PGP SIGNATURE-----