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 debian-7-turnkey-simplemachines_13.0-1_i386.ova.sig gpg: Signature made Tue Oct 15 19:23:56 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum ebbe3bc93a5618431a48d496f9b1e5b4996dc7b0 * md5sum a07bd9c14ae361ac8a0c786b99005ec8 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) iQEcBAABAgAGBQJSXZZGAAoJEIXCXpWhbrlNbiMIALR56xrLrdYGe8zJNrfO9+BM 7nud4wFShtSKIHgcH5UL59xaw3llOxFNv/nhQUcSF7yoMZpTeoEAfsJICnZkdblA OVdTKxXQJnKo5+GVnmI7RtcYY3IqUbcuqOnmD0oFbJ5Ii8IK74uIBAcFScbwO5cW j1fQ2huK7PvxGulcI0BabATNDI/JcFLAcliNt3LNjGRIgYOM6r2BOn4jssfmbOtr GMJ7ck8qMpW3eroYE7OAvWu6OwxwHZjKT1heatzFTdyRd9GA/o7OykJtDaWlF3md eETeU0z4Knp/YXjafkKnypr+wWrc5V+RczHaRtMnXRyi+3oaSkTExvYF6m+LTvw= =5j1t -----END PGP SIGNATURE-----