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-12.1-squeeze-amd64-vmdk.zip.sig gpg: Signature made Tue Jun 4 13:40:30 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 2c3dcfa10dcf75141f8f8a95fb6d111289bcf433 * md5sum bf68547c52ff4ddc4976a137743614e5 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJRre4/AAoJEIXCXpWhbrlNxVUIAL2xhfYT5m35yhFgsm3/JO87 QAXEJXjQ2P/PNSPyJw/s/ZKoXpCBCUNMtu8JqoDshlYw0dFbpdXUvgVb4halRck2 8AcGBB57dPFegDMFQ3MDcXHUyCsOUl0+vVO0Wv4+ZOUO8K4jTdrTHTm2qUbw0ut6 f9rWF8BE1B/0gFXZH68R9qF3UUSLyopndo97DsBgKFtlvp718xlelW4v8pwVn5ED bHBYSQzt88kpqgpMYZoYBEgsAKaWTlElE3t/1q5KWBBLuKlEfpCB+mkQVkHqEsdh 79AT3TtAQWh6BnxPkgkyWJPB07ikMj2iVRRhiqvL93x3Kf9rEZzR+CBw7hhb1mQ= =4+5K -----END PGP SIGNATURE-----