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-piwik-12.1-squeeze-i386-vmdk.zip.sig gpg: Signature made Tue Jun 4 23:16:11 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 2268f638ba6443fb337728b6ab296759a0a87b89 * md5sum 6f8f24c2e21a4b7ae87a4547f9cff3eb 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) iQEcBAABAgAGBQJRrnUtAAoJEIXCXpWhbrlN+GoH/1ThhhZ0ZrMlwgGEWSd674bC CzYycLAXkaFYkyCP0FYucqC6bHTj5CAJS+98FkKgmdeUo5HKo8/O3OtAkXUOEQvr KTL8duZUbz8g60jL7tK2OT9QL3mPlLZv28z2XmitYw7Vl2kGknqhl734mmCZKAmw OOVhjpFeBtXsPZTZHkCFLUCKs9NYDER1iGzLPgsFcIw3MHVFiRHfDVi1GUc4wU+3 fUzJyaPl465u4GWS0qjLDghTPN/Pkvm8KD75Afg1GMcJ7PKmkUNJWBZioGVRaw+V x7uofnWBJdTQEr1eFBqn5fJrcReSG7zp+xEWsALOS6Uqdlgmhq7NhMuSAdNRgoM= =Qtkr -----END PGP SIGNATURE-----