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-icescrum-13.0-wheezy-amd64-vmdk.zip.sig gpg: Signature made Wed Oct 16 08:47:19 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 198e2a6227af37a004861495eff844cd2c05b47f * md5sum 58999ae2a9ff3580b84ec1315090e620 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) iQEcBAABAgAGBQJSXlKGAAoJEIXCXpWhbrlNZD4H/Amj2ZOioEiaIFBmP5ChN2K+ 2uTRstE/K6BRD5vuIV3kvUojimXShTYS1kPnG6kxaSYT4+hDdIIXm3ixXKCMUsPe /oMTj9ZocigqmLkxmgyPNGfuKKiJjrJsCYlbgL84vb0hld/eKCJjcQYK6X7dQVH9 6IwYVvNhsbDJFmQPyOUXNLIJRc8SxVBUkHfHyDm5p2FcWj2+NSprO6WthIqtVNkz Iy5CTFiXmFf/6ZX5jOPF5WYvaK4vNNyl+1BJ0g89Zllmtf64XCPHZl+eWjlY/GYF yuHwpPKTnAXb9qDp5OELvzDMNG6F2JkwK4bM+uwT5eJytg4gHWcpKCK4KJjflf8= =s1Ns -----END PGP SIGNATURE-----