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-drupal7-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 11:39:03 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 4e3b13fe13c8b226371062ba565b6d7b0d14be44 * md5sum 2e97c759a527a383915b89f9d149afb0 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) iQEcBAABAgAGBQJQM3NLAAoJEIXCXpWhbrlNgP0IAOXXmug7oNH45PfFJuagRi+w ECPdErAA1nc/GCjEy9rZxVz/YpGQZXyMkKhIBO6JeJ455GBxI70YIQ7sP4T+xL6G d5XzLemXShrcdKnDP/rAtmUSeGG4YliCKYwphSiQizoAsWQvWvmAomMTLA/6UNR4 MQ4/Dfjd99V6icnucPLkuUl9BDaP4nYtQ+SZErU4oew2vKu4CgsQm96vHJb+vg64 9/uOp9u4uvPh5xN3SJZpVA2hcdrPOHqTsQfi6LK5pwGdlppUeLUXxxl2WnZvvJ5S 6jag0tm8jaCaG2fdjUnaZg9axTGMponZzc5JX+9ADnjFJNMPzTAtH+iFT3qb8Qs= =8Cco -----END PGP SIGNATURE-----