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-bugzilla-13.0-wheezy-amd64-vmdk.zip.sig gpg: Signature made Wed Oct 16 08:11:12 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 0e63fe59243f83001b5871b5abafbe8f724a1a57 * md5sum 56c4537ee7d9877ff8a1606bf0af29c2 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) iQEcBAABAgAGBQJSXkoXAAoJEIXCXpWhbrlNjusIAISTRENWHK5IoaWfo3A0mQDk dSiqgPfKY2+xJ1MrqtSrSEqh+29kBsUnXn1KLX4ontUqoluXsexu4enLyl6tHWxU 2qw1NdFIXLKMvp5pX9/qCYZ7fUxW77Z06TuS0BEIK6BFUCd1Y5O0NgeFetNEWpbf yKgV3qQpCRuY+WHbO2QiYwGs7FnpSSbTzxtZ/wpZVzioBqjMMuILrAcRlaLEshed 0wWXfkoHEODfa0CLHgEfFZ+5y3qdYF1CSOE+Acnn+QC/cBXco2tqYcxNnJef0SBx ZlHYxtrYXzB5vHdY/3EXjXxC3U8RSQpeNDYBwbV1VSWHTQICS121uvjvnGo8V8o= =4jv1 -----END PGP SIGNATURE-----