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-trac-12.1-squeeze-i386.iso.sig gpg: Signature made Thu Apr 18 14:10:44 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 46f87627cb7e8bae97e8b50e817291802782c7e6 * md5sum 52f4f6d1c9bec899705e4220d7971e77 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) iQEcBAABAgAGBQJRb/7cAAoJEIXCXpWhbrlNw5UH/iqK/Pyp2rLw5kq9q7/GxhgA GCoyLiO9OzH1KDbheQYPCWG2mNqJTmisGecxOZITJH3d1iWF3I5ZW+7j6YUVdJqm Usn57CAHcY4TI+JKNNJIy8Fg8EA8cekDWZ3F72xcEBzFifJnWQ7jXY5xtUQajmEw 7rMAL+YtlNDnLFP4qCEv9ySRmULC1iXdoL20flevLQegiCrHFzAqW8vfeKYklot6 u4Tbmly69J8sX8IxnuFtpFel7wrKCpmSjRGxneS4BJ3AVvdlshBIFQLrdrkxjYyy A5wSjOE96UZ2WOJ4EMzD+Vn5iAJ28lhIS+YJDPj8c/L3svPCHeAYN7GHI+g7zHY= =K6BU -----END PGP SIGNATURE-----