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 debian-7-turnkey-concrete5_13.0-1_amd64.tar.gz.sig gpg: Signature made Wed Oct 16 08:21:51 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 781d8846d7ed0d0b70d847ccfbcc88519f34ab04 * md5sum c5f76759be941184c65f8253180ebeba 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) iQEcBAABAgAGBQJSXkyYAAoJEIXCXpWhbrlN0ZcH/1b2Ab5UvwPFnYitJ5Y5vbg8 alqwTtcse1ch4snyXzgdjvSd6tx7gVSbyBg604J3Qhjd4Q94yuPw7QOnChGakXkd FNMf2f+cvj4yv8xB1u9J2rv5tZYM5KDXGARpbDQD+FaQXHw8IGg+G2m/Rr9OVC7E yMue4QMy+acxwEeS6OoPA76jl3/ScGPZOtoCFmFOqDTVZK5uxA65Vcgb/GnbXwVt VG159ehSOCFtoOi/AeFJBuzcU1bed7Sf6kDXEIgAw1+Nr1kSwuyO4EjcDaWDeCUy yqir33+hiSDv9aTB34NziJhaAntjv0z2uA0HedEX17ir21WgUEfpRIP5TlIlIfE= =Czox -----END PGP SIGNATURE-----