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-observium-13.0-wheezy-amd64-vmdk.zip.sig gpg: Signature made Thu Oct 17 18:03:06 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum bb0eab685646685a27dfd13aa202ea910e0aff44 * md5sum cf5b633cfe352a0df466a3a7d974b65e 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) iQEcBAABAgAGBQJSYCZOAAoJEIXCXpWhbrlNd7MH/j39qUUPezgf05XYcgvk2Yxz 0EuyoC0tO8FnhUPHdV9kjYSqahOJ/+AnfWSMeLtela7J8VZeem79wVJwZwEEemIu SBmarfCSSbl6AA+nB3ijsNWL3lcZYY+dZGwqdY2bAxKazkz6NBtHMYy0mm9biYyW 38Hm6oHNmS++T2ujG008O2PaARdlURI/8rnHVLLyHYQn+kbpXeb1Zeq+JaAjkHlS g2LUxQ0Px4GgCbU9CCfL5jV98Ln4eBWx222TW0lJYBkkyqoJv133qiRbXifHTlvN MDLpmSCmRQwytQn1ipSpSiVtzbb/d0E1wwMGTX9QikenkyNMuLPKPN8ZO9HCo+o= =l1u0 -----END PGP SIGNATURE-----