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-trac-13.0-wheezy-i386-ovf.zip.sig gpg: Signature made Tue Oct 15 19:58:59 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 7b902d0cfea20d9be325d3bf4b4b496da94a4ea3 * md5sum 6eff3ccd997c94d96ce0a71b3b43720a 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) iQEcBAABAgAGBQJSXZ56AAoJEIXCXpWhbrlN3QoH/RmoqlGGWR7sgUrMtXM2+1qG p/eOjGMaiyyFWlsSdX3/+e9ouNS0q+Buvn3M5IWQjbs7xs3m12x8sTGrXhpxEzpd 3a4HADcFD+W3wbdYpxFq6+tFnfKE8Yfz6uKeIbVhO2gciy1xpnYNVpWoepp0xZJb z+jmffa/iQZNkiTvIninr9RMTpVQ5aGA903o8rpM90hU6NHomesTJV8JIp/l4Eo6 RetrzSJdgodAJNw36b/f0rCHxlzNAVJDJ1Ui0/bTgNzZ0n7+S6pg/gVQvFe66kfX Q7iiqXPn/Qns7rs0bq+VYhz/YxsJP5aGTVyxLdXuyl7T8LLD/tRdgdmKyy2WCsA= =6WQT -----END PGP SIGNATURE-----