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-processmaker-13.0-wheezy-amd64-xen.tar.bz2.sig gpg: Signature made Fri Nov 1 09:28:28 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 78b418ae48f6220596060c8c974831a25265c098 * md5sum adecca2ffcbdf7a09d33e9c5416682c6 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) iQEcBAABAgAGBQJSc3Q1AAoJEIXCXpWhbrlNmfwIAML0wKUdRBVbn2AJNU48H+6W SHZZDeiiaxr3ZVqpPdUD5s8LnNK+sz8CY2IScvUS4V/XiPjL0f/6vwqJh/vN7p9Z i7C7cn1QClt/pv3j8WG0ySy7MB1uW20EVjanO+y7Ntlm1b4OFKIJd8I5XAEyTQ6j 3x697wX5cn+lPwNFaqz8BwUVw9Q9fASAcyElyAs2A7pihWamqf9ugtKCspGNUhQR iNQJn0ZR5WR4Hk5NdjNLHC3YZjYcf+jOINaxILl0i1gLBL/2fpuV16Q6as6x+EYp JurWX1RECcb+uePMPLn3AtcUBmRrnbYBC5Z7zJMU0m4KxBLo7AG1499ydi5GLXw= =C3yk -----END PGP SIGNATURE-----