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-simplemachines-13.0-wheezy-amd64-vmdk.zip.sig gpg: Signature made Wed Oct 16 10:09:36 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum b0bd49a5d6204cb33f4df2a672ddfd3b63b0eba1 * md5sum 40d39cb9c98c5e565ae1d253d5155ccd 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) iQEcBAABAgAGBQJSXmXXAAoJEIXCXpWhbrlNFs0IANfzlHPP9McYSyPpXGvuK2Vs goBbj/xTLf8AKMLpbzC+lcQfDHljec1D+WanoKR3d8J7Qz+dFknTzGVbu0SqSTQK iVnhuqYBYgTH2X7tU56gO42M34AXSWYLgYYFhtABVSuVfemZXfFLFGUSGhzAW2He Y44frp85wfhOdo/Ds/5+L/07KplLbADAG0Tn4czFKskrX/6lqNkY5Jb8gMGM7h7t HeRory3RT4CtaMl7RgyOJFtzOyvDb2VGI1J2q5PYHua1iM99pL0MIE4UZ4x1iHW4 AM5oBtSGUQT5L3Ludz1xD1f/BfnJs83+WuZvfWQ9ZVHKIYENGcH6PgZDHqJwk6Y= =umw7 -----END PGP SIGNATURE-----