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-12.1-squeeze-amd64.iso.sig gpg: Signature made Wed May 1 14:10:49 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 70e0d307c0b5eb103fcba466657c6defd4c07df0 * md5sum 82031991df404d17a8744b38f3af34ba 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) iQEcBAABAgAGBQJRgSJhAAoJEIXCXpWhbrlNShUH/15TCaqybqMUfEaKQ5hb6Jib Y2uofMWUgCZ8m254gQEo1E3Gvoo81JVV4RTpwLScRThGU5ZLZNz0MJitLL7ASFtY +NsJobN5a/MayfsBir32ACeQgizlhVgVJk1+oJ0M6Yr/eFVfjDZkQGjuRztlmM4W 89nD4xy1c9WuP0yhaP/XsovibzLTlKFZktKVab9pzr/cMNZg0cTPyQWFC9FzNqrC DMKLUnAqQ8mOJWotvLrA2v0djkv8KC9T6t4t01epdfl4u1K24ocj0QUnwVGzahQh CweyQpNIsRwWfaoudGIIjsCioa1i/uDdwrIseIPbbbL1/4Zj9wo4Akh43/G6FMw= =TnLp -----END PGP SIGNATURE-----