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-concrete5-13.0-wheezy-amd64-xen.tar.bz2.sig gpg: Signature made Fri Nov 1 08:52:39 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 6612c06a273d6fb293d6141db5ad6d8da242afac * md5sum f4d6b05ccfa303b51c6df8fb47e18fd8 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) iQEcBAABAgAGBQJSc2vRAAoJEIXCXpWhbrlNgzwIAI4K02kEHSL2ovJb3YmVjLJw ruWX8FXZICqbqMSBfCYoTB/RP/eFB65kyG/gTTnoBnPosdZlAcNgO2P9h1DEXyrU Tfbc5BsJxAvcGysgNXarHxwNp2x23zXxvkdQkMAQfSJ3+YZNCxw/DvhCDyQluj52 2Bf7DmbxL42ZSa6Oehu8sUW/VXFF1mb78v8RWZddLLQODVdoJU/BWiK8rrTQPX3W QgtsPk01UToqxGGhkb6+8CABhhq3XukjzK95q8stG+QT6k3Ir77tQE6ilV8IwP9j bP5vRqE2ZLjytfp8RECNGcmQHO9Hjv56g8vqHMzMVu2LRIWn5bWzZuNaTBiLoZg= =b+Wp -----END PGP SIGNATURE-----