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-xoops-13.0-wheezy-amd64-ovf.zip.sig gpg: Signature made Wed Oct 16 10:43:18 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 52720df89c9a56fd6a63f5577cccc7d940da2a03 * md5sum fb3e0c895248c4d401253682db3c06ac 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) iQEcBAABAgAGBQJSXm28AAoJEIXCXpWhbrlNxhUH/RzAIPmxqzikWtLs5VcTtwOI /x4JKePuULhPBu3povS0vonNVmYgawIcJXUuNN83qhGkAB66xWBiEp/B/sVfDAKh mDgzqqzSuE504lQYzjupst8xJzkWeSDqTwnDCn2jDQfvsUyyvIQ5X+m4iNlXHqD5 MMkSpk1uTZTyLcY0uAj/0XCNobm/5XY3Vmoge8bpItS57GHV2rWpcLicUQNEc+Kr drMF5vjim7fs+ed/liZl4EkGAEI6vsKGVId9lh0z1hsx02ojUEgr4uvT4aReBJ2O Zmivh9DIYpyDxZP+BvxWXhgkCLqJ8Rlpywc9RRrd1IXLxhfn4XcVdIWmDGHFTlQ= =j/K8 -----END PGP SIGNATURE-----