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-domain-controller-13.0-wheezy-i386-vmdk.zip.sig gpg: Signature made Tue Oct 15 15:33:50 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum cc274f691644beb62506318a032a530c6f389360 * md5sum 74de78beea2c61f3378c08c37e877056 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) iQEcBAABAgAGBQJSXWBSAAoJEIXCXpWhbrlNFlUIAIAJ5ghY+2ruSE6EVJjAuJur s6SwPCa8ngImmbCNtXsx4ATse6j7Us66wnNIMr9jMCMXXacLxZSNxcK1l6egX21+ 1jjIgByk8bObegMj35xTTLEAh0PmfWkv2cjM+kXaRzyOMz8EsdiVk7g8bf1sEPBl gfwkxCILD+0TecDLvRsv1HLNGhBMYPeyMasWE3x3IDiSFO14xF7T+IPAEZ9ef0rJ phrRJA0R5wiK0H37I99132XkPP/REUbiErQFr4D5QphAX+d7CYywvmr/Ot3Ckj7d FADKe7igxaHb0VyJsCOUKz6H5IZ1cb9pGvzhTJyZfgoOXqucRTQe6IbyYD5k4ls= =dsH6 -----END PGP SIGNATURE-----