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-12.0-squeeze-x86-vmdk.zip.sig gpg: Signature made Tue Aug 21 11:51:06 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 5aba902d96b051826e4e44a48a13c5c58a64fdca * md5sum 4f81e1cfb5ccd545fb5a6dfa2b96972d 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) iQEcBAABAgAGBQJQM3YVAAoJEIXCXpWhbrlNqSQH/j5v+upgiuI/DlNu0CNz67Oa 6FmG7fhI+RN2AtBVu6BwFG04kLuy5LgYyPbYmIi0ZoMA4BXb+hmArozoDhWX7m6I QR74oaZC5ptB7P9vxvaVTex2/8bcfmMGP1HLdoTOOhvFtNr62WcBsHGhNmUm0K1e /mCUSsigoBLHgTAkuKlppuIIFBwimrYc6z9HoqLyL3jJlbp3sc1myuT4RcOf3Zm6 k3kcum95akoFCw789XnY4MVtJk7HT2efsOSHreAZV2qXxj3FbvKW1agfG0WrhNHw TySOxxFnsjLXEu42lMPIpj/z1s8FkXuVcZ06huqzyojvLocw/GhYI9ncdzIHYfE= =SUfD -----END PGP SIGNATURE-----