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-collabtive-12.0-squeeze-x86.iso.sig gpg: Signature made Sat Aug 18 16:57:02 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum 0f45cdda3d2736cdf9dd6b75a4f098c5840b4567 * md5sum 028f2a2a5c113db4e487db46d6ca9a90 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) iQEcBAABAgAGBQJQL8lUAAoJEIXCXpWhbrlNoKMH/AlXavRRpUZ+NdXlW6Mm+z7Z IRGuplhtW4kCgCmE6jl4vC1KzB7oCT+1r4G0UlWp6fv0UHJzz+/D/irMVjL1fXIV kdfVdnSv96/Wu2cq9awhiv6XHMUQry1iy26d9pSusPdxhITvUW3On0/fArxRmA5Z 3PmWByK1LkWBRh/5cA+JVKg9kU4KZhrQZgMndkWcafFV6DoQICSEHPhmt/PJhqIm YzG/V6m6hjYRdSlLAyigc4HuaOebh8tBZX9BLaKr4yKNfI+mFLbJDLcho/qFU6e2 p96IRX0RR49WBKp9w9bhwzx7bGiLJhbUkDywxRwYnII3f/R3C2hYFIQnPBwWZeQ= =oQvK -----END PGP SIGNATURE-----