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-6-turnkey-concrete5_12.1-1_amd64.tar.gz.sig gpg: Signature made Tue Jun 4 12:51:18 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum d489ffb35ebd07c892d1a4f72d3901d9f84ed07f * md5sum 112b3956d136528f1b5f03fa46bab003 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 v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJRreLAAAoJEIXCXpWhbrlNh4cH/jTuo6iMmdgo9psdx5EI0qVf 5y/H/5LwOk0iLVPxFHPLFswMoxmI0DWFLH4alfdht7/24P0wWQlTh2D7Lp05L7pc cxfZd1jZH2lqdztYbad6GUM4QB609kKKaAs/c+DHlmxsNqZXqgs1iEN16Go+iaaj 3UrTEKJofHqenvALESUD/cUvzk3jE+BziMdEDUcFjwcdGpdr1B5B+HpCXQMpb35w aC7g8opHB3185bPF2SA7/BOqfwyUxkdtrNRdzmz5XhhilkxXdWmzXWuUjwCCb3nq qLfkqFFEyDullDtIGPMti0oVT9FMumUEBjEO3/ZrR8RSGnWgAutqp5lvcjKOJt4= =EDe+ -----END PGP SIGNATURE-----