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-phpbb-13.0-wheezy-i386-ovf.zip.sig gpg: Signature made Tue Oct 15 17:40:45 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 913db5798a2c601a90cbeb99f9d32e9c09ead2e7 * md5sum 4c9f35cd9ae181c20b3df14dacfd13ed 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 v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSXX4SAAoJEIXCXpWhbrlNGLoH/1a7HCJ6M7sHxwX6TAwu1Tof Zy387qom1tgz80VYfSxjgwmDam2wgGQXItmmQbDmxRFQ4bGpZvKiHPHaRiFb5anV Bt91M3QbeyZtYislof1NLkJ34h0eXP7EypLJ1/0vmnI2lpP5PyDey4hl/AC9VgMW wZpkecf2HKTTrkuWv2rw+zEspeGKNSGPsrNUxopu3NrNJGkonCSbHuBa46VL8Bb4 DR3h3XCVUv+ZcfT6E8r1UZyhaCO2ksnZumlf42Tw6mhgyzKJK2NcTh0Nm+dCkj2l jESHCCqTFr9jQK9qR8RqIQOidISzg9mTbhXzv10eM+HS3dxzn2UhrXfjsZ9g130= =gJS9 -----END PGP SIGNATURE-----